diff --git a/src/idz/decoder/checkTeamName.ts b/src/idz/decoder/checkTeamName.ts
new file mode 100644
index 0000000..78ab285
--- /dev/null
+++ b/src/idz/decoder/checkTeamName.ts
@@ -0,0 +1,9 @@
+import { RequestCode } from "./_defs";
+import { CheckTeamNameRequest } from "../request/checkTeamName";
+
+checkTeamName.msgCode = 0x00a2 as RequestCode;
+checkTeamName.msgLen = 0x0040;
+
+export function checkTeamName(buf: Buffer): CheckTeamNameRequest {
+  return { type: "check_team_name_req" };
+}
diff --git a/src/idz/decoder/createTeam.ts b/src/idz/decoder/createTeam.ts
new file mode 100644
index 0000000..8962876
--- /dev/null
+++ b/src/idz/decoder/createTeam.ts
@@ -0,0 +1,23 @@
+import iconv = require("iconv-lite");
+
+import { RequestCode } from "./_defs";
+import { Id } from "../model/base";
+import { Profile } from "../model/profile";
+import { CreateTeamRequest } from "../request/createTeam";
+
+createTeam.msgCode = 0x0071 as RequestCode;
+createTeam.msgLen = 0x0050;
+
+export function createTeam(buf: Buffer): CreateTeamRequest {
+  return {
+    type: "create_team_req",
+    profileId: buf.readUInt32LE(0x0004) as Id<Profile>,
+    teamName: iconv.decode(buf.slice(0x0008, 0x0028), "shift_jis"),
+    field_0028: buf.readUInt16LE(0x0028),
+    field_002C: buf.readUInt32LE(0x002c),
+    field_0030: buf.readUInt8(0x0030),
+    field_0032: buf.readUInt16LE(0x0032),
+    prevTeamId: buf.readUInt32LE(0x0034),
+    field_0038: buf.slice(0x0038, 0x0045),
+  };
+}
diff --git a/src/idz/decoder/index.ts b/src/idz/decoder/index.ts
index 2cd6f5e..5b46647 100644
--- a/src/idz/decoder/index.ts
+++ b/src/idz/decoder/index.ts
@@ -1,7 +1,8 @@
 import { Transform } from "stream";
 
-import { saveTimeAttack } from "./saveTimeAttack";
+import { checkTeamName } from "./checkTeamName";
 import { createProfile } from "./createProfile";
+import { createTeam } from "./createTeam";
 import { joinAutoTeam } from "./joinAutoTeam";
 import { discoverProfile } from "./discoverProfile";
 import { load2on2 } from "./load2on2";
@@ -23,6 +24,7 @@ import { saveGarage } from "./saveGarage";
 import { saveProfile } from "./saveProfile";
 import { saveSettings } from "./saveSettings";
 import { saveStocker } from "./saveStocker";
+import { saveTimeAttack } from "./saveTimeAttack";
 import { saveTopic } from "./saveTopic";
 import { unlockProfile } from "./unlockProfile";
 import { updateProvisionalStoreRank } from "./updateProvisionalStoreRank";
@@ -41,7 +43,9 @@ export type ReaderFn = ((buf: Buffer) => Request) & {
 };
 
 const funcList: ReaderFn[] = [
+  checkTeamName,
   createProfile,
+  createTeam,
   joinAutoTeam,
   discoverProfile,
   load2on2,
diff --git a/src/idz/encoder/checkTeamName.ts b/src/idz/encoder/checkTeamName.ts
new file mode 100644
index 0000000..0ae229e
--- /dev/null
+++ b/src/idz/encoder/checkTeamName.ts
@@ -0,0 +1,10 @@
+import { CheckTeamNameResponse } from "../response/checkTeamName";
+
+export function checkTeamName(res: CheckTeamNameResponse): Buffer {
+  const buf = Buffer.alloc(0x0010);
+
+  buf.writeUInt16LE(0x00a3, 0x0000);
+  buf.writeUInt32LE(res.status, 0x0004);
+
+  return buf;
+}
diff --git a/src/idz/encoder/createTeam.ts b/src/idz/encoder/createTeam.ts
new file mode 100644
index 0000000..0f48984
--- /dev/null
+++ b/src/idz/encoder/createTeam.ts
@@ -0,0 +1,11 @@
+import { CreateTeamResponse } from "../response/createTeam";
+
+export function createTeam(res: CreateTeamResponse): Buffer {
+  const buf = Buffer.alloc(0x0010);
+
+  buf.writeUInt16LE(0x0072, 0x0000);
+  buf.writeUInt32LE(res.status, 0x0004);
+  buf.writeUInt32LE(res.teamId, 0x0008);
+
+  return buf;
+}
diff --git a/src/idz/encoder/index.ts b/src/idz/encoder/index.ts
index b580a54..f3f6daf 100644
--- a/src/idz/encoder/index.ts
+++ b/src/idz/encoder/index.ts
@@ -1,6 +1,8 @@
 import { Transform } from "stream";
 
 import { _team } from "./_team";
+import { checkTeamName } from "./checkTeamName";
+import { createTeam } from "./createTeam";
 import { discoverProfile } from "./discoverProfile";
 import { generic } from "./generic";
 import { lockProfile } from "./lockProfile";
@@ -27,6 +29,12 @@ import { Response } from "../response";
 
 function encode(res: Response): Buffer {
   switch (res.type) {
+    case "check_team_name_res":
+      return checkTeamName(res);
+
+    case "create_team_res":
+      return createTeam(res);
+
     case "discover_profile_res":
       return discoverProfile(res);
 
diff --git a/src/idz/handler/checkTeamName.ts b/src/idz/handler/checkTeamName.ts
new file mode 100644
index 0000000..934d766
--- /dev/null
+++ b/src/idz/handler/checkTeamName.ts
@@ -0,0 +1,13 @@
+import { CheckTeamNameRequest } from "../request/checkTeamName";
+import { CheckTeamNameResponse } from "../response/checkTeamName";
+import { World } from "../world";
+
+export function checkTeamName(
+  w: World,
+  req: CheckTeamNameRequest
+): CheckTeamNameResponse {
+  return {
+    type: "check_team_name_res",
+    status: 0,
+  };
+}
diff --git a/src/idz/handler/createTeam.ts b/src/idz/handler/createTeam.ts
new file mode 100644
index 0000000..14f7315
--- /dev/null
+++ b/src/idz/handler/createTeam.ts
@@ -0,0 +1,16 @@
+import { Id } from "../model/base";
+import { Team } from "../model/team";
+import { CreateTeamRequest } from "../request/createTeam";
+import { CreateTeamResponse } from "../response/createTeam";
+import { World } from "../world";
+
+export function createTeam(
+  w: World,
+  req: CreateTeamRequest
+): CreateTeamResponse {
+  return {
+    type: "create_team_res",
+    status: 0,
+    teamId: 3 as Id<Team>,
+  };
+}
diff --git a/src/idz/handler/index.ts b/src/idz/handler/index.ts
index 13c825d..2dd7379 100644
--- a/src/idz/handler/index.ts
+++ b/src/idz/handler/index.ts
@@ -1,6 +1,7 @@
 import { _team } from "./_team";
-import { saveTimeAttack } from "./saveTimeAttack";
+import { checkTeamName } from "./checkTeamName";
 import { createProfile } from "./createProfile";
+import { createTeam } from "./createTeam";
 import { discoverProfile } from "./discoverProfile";
 import { load2on2 } from "./load2on2";
 import { loadConfig } from "./loadConfig";
@@ -21,6 +22,7 @@ import { saveGarage } from "./saveGarage";
 import { saveProfile } from "./saveProfile";
 import { saveSettings } from "./saveSettings";
 import { saveStocker } from "./saveStocker";
+import { saveTimeAttack } from "./saveTimeAttack";
 import { saveTopic } from "./saveTopic";
 import { unlockProfile } from "./unlockProfile";
 import { updateProvisionalStoreRank } from "./updateProvisionalStoreRank";
@@ -35,9 +37,15 @@ import { World } from "../world";
 
 export async function dispatch(w: World, req: Request): Promise<Response> {
   switch (req.type) {
+    case "check_team_name_req":
+      return checkTeamName(w, req);
+
     case "create_profile_req":
       return createProfile(w, req);
 
+    case "create_team_req":
+      return createTeam(w, req);
+
     case "join_auto_team_req":
       return _team(w, req);
 
diff --git a/src/idz/request/checkTeamName.ts b/src/idz/request/checkTeamName.ts
new file mode 100644
index 0000000..c80dd09
--- /dev/null
+++ b/src/idz/request/checkTeamName.ts
@@ -0,0 +1,3 @@
+export interface CheckTeamNameRequest {
+  type: "check_team_name_req";
+}
diff --git a/src/idz/request/createTeam.ts b/src/idz/request/createTeam.ts
new file mode 100644
index 0000000..b0e18e4
--- /dev/null
+++ b/src/idz/request/createTeam.ts
@@ -0,0 +1,14 @@
+import { Id } from "../model/base";
+import { Profile } from "../model/profile";
+
+export interface CreateTeamRequest {
+  type: "create_team_req";
+  profileId: Id<Profile>; // u32
+  teamName: string; // len 0x20
+  field_0028: number; // u16
+  field_002C: number; // u32 (but only holds a u8)
+  field_0030: number; // u8
+  field_0032: number; // u16
+  prevTeamId: number; // u32
+  field_0038: Buffer; // len 0x0D ..? weird length
+}
diff --git a/src/idz/request/index.ts b/src/idz/request/index.ts
index b724ab0..5419934 100644
--- a/src/idz/request/index.ts
+++ b/src/idz/request/index.ts
@@ -1,4 +1,6 @@
+import { CheckTeamNameRequest } from "./checkTeamName";
 import { CreateProfileRequest } from "./createProfile";
+import { CreateTeamRequest } from "./createTeam";
 import { DiscoverProfileRequest } from "./discoverProfile";
 import { JoinAutoTeamRequest } from "./joinAutoTeam";
 import { Load2on2Request } from "./load2on2";
@@ -32,7 +34,9 @@ import { UpdateUiReportRequest } from "./updateUiReport";
 import { UpdateUserLogRequest } from "./updateUserLog";
 
 export type Request =
+  | CheckTeamNameRequest
   | CreateProfileRequest
+  | CreateTeamRequest
   | DiscoverProfileRequest
   | JoinAutoTeamRequest
   | Load2on2Request
diff --git a/src/idz/response/checkTeamName.ts b/src/idz/response/checkTeamName.ts
new file mode 100644
index 0000000..7143835
--- /dev/null
+++ b/src/idz/response/checkTeamName.ts
@@ -0,0 +1,4 @@
+export interface CheckTeamNameResponse {
+  type: "check_team_name_res";
+  status: number; // Anything other than 4 is success
+}
diff --git a/src/idz/response/createTeam.ts b/src/idz/response/createTeam.ts
new file mode 100644
index 0000000..aa2d886
--- /dev/null
+++ b/src/idz/response/createTeam.ts
@@ -0,0 +1,8 @@
+import { Id } from "../model/base";
+import { Team } from "../model/team";
+
+export interface CreateTeamResponse {
+  type: "create_team_res";
+  status: number; // 0 is success, 1 is failure
+  teamId: Id<Team>;
+}
diff --git a/src/idz/response/index.ts b/src/idz/response/index.ts
index d708123..836b412 100644
--- a/src/idz/response/index.ts
+++ b/src/idz/response/index.ts
@@ -1,3 +1,5 @@
+import { CheckTeamNameResponse } from "./checkTeamName";
+import { CreateTeamResponse } from "./createTeam";
 import { DiscoverProfileResponse } from "./discoverProfile";
 import { GenericResponse } from "./generic";
 import { JoinAutoTeamResponse } from "./joinAutoTeam";
@@ -24,6 +26,8 @@ import { UpdateStoryClearNumResponse } from "./updateStoryClearNum";
 import { UnlockProfileResponse } from "./unlockProfile";
 
 export type Response =
+  | CheckTeamNameResponse
+  | CreateTeamResponse
   | DiscoverProfileResponse
   | GenericResponse
   | JoinAutoTeamResponse