diff --git a/src/idz/decoder/createTeam.ts b/src/idz/decoder/createTeam.ts
deleted file mode 100644
index 13c3961..0000000
--- a/src/idz/decoder/createTeam.ts
+++ /dev/null
@@ -1,14 +0,0 @@
-import { RequestCode } from "./_defs";
-import { CreateTeamRequest } from "../request/createTeam";
-
-createTeam.msgCode = 0x007b as RequestCode;
-createTeam.msgLen = 0x0010;
-
-export function createTeam(buf: Buffer): CreateTeamRequest {
-  return {
-    type: "create_team_req",
-    field_0004: buf.readUInt32LE(0x0004),
-    field_0008: buf.readUInt32LE(0x0008),
-    field_000C: buf.readUInt8(0x000c),
-  };
-}
diff --git a/src/idz/decoder/index.ts b/src/idz/decoder/index.ts
index f606ef8..2cd6f5e 100644
--- a/src/idz/decoder/index.ts
+++ b/src/idz/decoder/index.ts
@@ -2,7 +2,7 @@ import { Transform } from "stream";
 
 import { saveTimeAttack } from "./saveTimeAttack";
 import { createProfile } from "./createProfile";
-import { createTeam } from "./createTeam";
+import { joinAutoTeam } from "./joinAutoTeam";
 import { discoverProfile } from "./discoverProfile";
 import { load2on2 } from "./load2on2";
 import { loadConfig } from "./loadConfig";
@@ -42,7 +42,7 @@ export type ReaderFn = ((buf: Buffer) => Request) & {
 
 const funcList: ReaderFn[] = [
   createProfile,
-  createTeam,
+  joinAutoTeam,
   discoverProfile,
   load2on2,
   loadConfig,
diff --git a/src/idz/decoder/joinAutoTeam.ts b/src/idz/decoder/joinAutoTeam.ts
new file mode 100644
index 0000000..0cc6de8
--- /dev/null
+++ b/src/idz/decoder/joinAutoTeam.ts
@@ -0,0 +1,14 @@
+import { RequestCode } from "./_defs";
+import { JoinAutoTeamRequest } from "../request/joinAutoTeam";
+
+joinAutoTeam.msgCode = 0x007b as RequestCode;
+joinAutoTeam.msgLen = 0x0010;
+
+export function joinAutoTeam(buf: Buffer): JoinAutoTeamRequest {
+  return {
+    type: "join_auto_team_req",
+    field_0004: buf.readUInt32LE(0x0004),
+    field_0008: buf.readUInt32LE(0x0008),
+    field_000C: buf.readUInt8(0x000c),
+  };
+}
diff --git a/src/idz/encoder/_team.ts b/src/idz/encoder/_team.ts
index e9afa70..f050894 100644
--- a/src/idz/encoder/_team.ts
+++ b/src/idz/encoder/_team.ts
@@ -1,8 +1,8 @@
 import iconv = require("iconv-lite");
-import { CreateTeamResponse } from "../response/createTeam";
+import { JoinAutoTeamResponse } from "../response/joinAutoTeam";
 import { LoadTeamResponse } from "../response/loadTeam";
 
-export function _team(res: CreateTeamResponse | LoadTeamResponse) {
+export function _team(res: JoinAutoTeamResponse | LoadTeamResponse) {
   const buf = Buffer.alloc(0x0ca0);
 
   buf.writeUInt32LE(res.team.id, 0x000c);
@@ -32,7 +32,7 @@ export function _team(res: CreateTeamResponse | LoadTeamResponse) {
   buf.writeInt32LE(0x00000004, 0x0344 + 0x001c);
   */
 
-  if (res.type === "create_team_res") {
+  if (res.type === "join_auto_team_res") {
     buf.writeInt16LE(0x007c, 0x0000);
   } else {
     buf.writeInt16LE(0x0078, 0x0000);
diff --git a/src/idz/encoder/index.ts b/src/idz/encoder/index.ts
index 28ebccc..b580a54 100644
--- a/src/idz/encoder/index.ts
+++ b/src/idz/encoder/index.ts
@@ -27,12 +27,12 @@ import { Response } from "../response";
 
 function encode(res: Response): Buffer {
   switch (res.type) {
-    case "create_team_res":
-      return _team(res);
-
     case "discover_profile_res":
       return discoverProfile(res);
 
+    case "join_auto_team_res":
+      return _team(res);
+
     case "generic_res":
       return generic(res);
 
diff --git a/src/idz/encoder/loadProfile2.ts b/src/idz/encoder/loadProfile2.ts
index ddfbfe4..deb8ba8 100644
--- a/src/idz/encoder/loadProfile2.ts
+++ b/src/idz/encoder/loadProfile2.ts
@@ -93,7 +93,7 @@ export function loadProfile2(res: LoadProfileResponse2) {
   bitmap(res.titles, 0xb4).copy(buf, 0x720);
   buf.writeUInt8(res.settings.paperCup, 0x07d9);
   buf.writeUInt8(res.settings.gauges, 0x07da);
-  buf.writeInt32LE(res.teamId || 0, 0x07e0);
+  buf.writeUInt32LE(res.teamId || 0xffffffff, 0x07e0);
   car(res.car).copy(buf, 0x0c5c);
 
   return buf;
diff --git a/src/idz/handler/_team.ts b/src/idz/handler/_team.ts
index 197ad72..7667e3b 100644
--- a/src/idz/handler/_team.ts
+++ b/src/idz/handler/_team.ts
@@ -1,15 +1,15 @@
 import { Id } from "../model/base";
 import { Team } from "../model/team";
-import { CreateTeamRequest } from "../request/createTeam";
+import { JoinAutoTeamRequest } from "../request/joinAutoTeam";
 import { LoadTeamRequest } from "../request/loadTeam";
-import { CreateTeamResponse } from "../response/createTeam";
+import { JoinAutoTeamResponse } from "../response/joinAutoTeam";
 import { LoadTeamResponse } from "../response/loadTeam";
 import { World } from "../world";
 
 export function _team(
   w: World,
-  req: CreateTeamRequest | LoadTeamRequest
-): CreateTeamResponse | LoadTeamResponse {
+  req: JoinAutoTeamRequest | LoadTeamRequest
+): JoinAutoTeamResponse | LoadTeamResponse {
   const bits = {
     team: {
       id: 2 as Id<Team>,
@@ -18,8 +18,8 @@ export function _team(
     members: [],
   };
 
-  if (req.type === "create_team_req") {
-    return { type: "create_team_res", ...bits };
+  if (req.type === "join_auto_team_req") {
+    return { type: "join_auto_team_res", ...bits };
   } else {
     return { type: "load_team_res", ...bits };
   }
diff --git a/src/idz/handler/index.ts b/src/idz/handler/index.ts
index 48cedf0..13c825d 100644
--- a/src/idz/handler/index.ts
+++ b/src/idz/handler/index.ts
@@ -38,7 +38,7 @@ export async function dispatch(w: World, req: Request): Promise<Response> {
     case "create_profile_req":
       return createProfile(w, req);
 
-    case "create_team_req":
+    case "join_auto_team_req":
       return _team(w, req);
 
     case "load_2on2_req":
diff --git a/src/idz/request/createTeam.ts b/src/idz/request/createTeam.ts
deleted file mode 100644
index fb0ac03..0000000
--- a/src/idz/request/createTeam.ts
+++ /dev/null
@@ -1,6 +0,0 @@
-export interface CreateTeamRequest {
-  type: "create_team_req";
-  field_0004: number;
-  field_0008: number;
-  field_000C: number;
-}
diff --git a/src/idz/request/index.ts b/src/idz/request/index.ts
index ff7852b..b724ab0 100644
--- a/src/idz/request/index.ts
+++ b/src/idz/request/index.ts
@@ -1,6 +1,6 @@
 import { CreateProfileRequest } from "./createProfile";
-import { CreateTeamRequest } from "./createTeam";
 import { DiscoverProfileRequest } from "./discoverProfile";
+import { JoinAutoTeamRequest } from "./joinAutoTeam";
 import { Load2on2Request } from "./load2on2";
 import { LoadConfigRequest } from "./loadConfig";
 import { LoadConfigRequest2 } from "./loadConfig2";
@@ -33,8 +33,8 @@ import { UpdateUserLogRequest } from "./updateUserLog";
 
 export type Request =
   | CreateProfileRequest
-  | CreateTeamRequest
   | DiscoverProfileRequest
+  | JoinAutoTeamRequest
   | Load2on2Request
   | LoadConfigRequest
   | LoadConfigRequest2
diff --git a/src/idz/request/joinAutoTeam.ts b/src/idz/request/joinAutoTeam.ts
new file mode 100644
index 0000000..99423cf
--- /dev/null
+++ b/src/idz/request/joinAutoTeam.ts
@@ -0,0 +1,6 @@
+export interface JoinAutoTeamRequest {
+  type: "join_auto_team_req";
+  field_0004: number;
+  field_0008: number;
+  field_000C: number;
+}
diff --git a/src/idz/response/createTeam.ts b/src/idz/response/createTeam.ts
deleted file mode 100644
index 2eb1835..0000000
--- a/src/idz/response/createTeam.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-import { BaseTeamResponse } from "./_team";
-
-export interface CreateTeamResponse extends BaseTeamResponse {
-  type: "create_team_res";
-}
diff --git a/src/idz/response/index.ts b/src/idz/response/index.ts
index 75b94b4..d708123 100644
--- a/src/idz/response/index.ts
+++ b/src/idz/response/index.ts
@@ -1,6 +1,6 @@
-import { CreateTeamResponse } from "./createTeam";
 import { DiscoverProfileResponse } from "./discoverProfile";
 import { GenericResponse } from "./generic";
+import { JoinAutoTeamResponse } from "./joinAutoTeam";
 import { Load2on2Response } from "./load2on2";
 import { LoadConfigResponse } from "./loadConfig";
 import { LoadConfigResponse2 } from "./loadConfig2";
@@ -24,9 +24,9 @@ import { UpdateStoryClearNumResponse } from "./updateStoryClearNum";
 import { UnlockProfileResponse } from "./unlockProfile";
 
 export type Response =
-  | CreateTeamResponse
   | DiscoverProfileResponse
   | GenericResponse
+  | JoinAutoTeamResponse
   | Load2on2Response
   | LoadConfigResponse
   | LoadConfigResponse2
diff --git a/src/idz/response/joinAutoTeam.ts b/src/idz/response/joinAutoTeam.ts
new file mode 100644
index 0000000..fe87d0d
--- /dev/null
+++ b/src/idz/response/joinAutoTeam.ts
@@ -0,0 +1,5 @@
+import { BaseTeamResponse } from "./_team";
+
+export interface JoinAutoTeamResponse extends BaseTeamResponse {
+  type: "join_auto_team_res";
+}