BullyWiiPlaza / JGeckoU

Overview

JGecko U is a replacement for TCP Gecko.NET as a platform independent Wii U RAM debugger and cheat code manager for Wii U titles.

It is the most advanced Wii U game hack/cheat development tool which is used by almost all mod developers and end users across all Wii U titles.

Setup

PC side:

• Install Java 8+
• Download JGecko U.jar from here*
• Double-click JGecko U.jar OR type java -jar "JGecko U.jar" on the command line/Terminal to launch JGecko U

Wii U side:

• Download the TCP Gecko Installer. Extract it to your SD Card into the folder E:\wiiu\apps\TCPGecko*
• Proceed to run the Homebrew Launcher by visiting http://u.wiidb.de with your Wii U. Finally, load the TCP Gecko Installer app and confirm the desired TCP Gecko Installer installation mode.

*Alternatively: Use the Gecko U Updater application.

A YouTube video visually showing the full setup guide can be found here.

Troubleshooting

• JGecko U does not connect successfully despite following all steps correctly:
  Usually, your (Windows) Firewall will ask you for permission to allow java.exe to access the network the first time you're trying to use the network with a Java application like JGecko U. Obviously, you need to give this permission (and specify you're inside a private network). Note: If no such pop-up comes up, you may need to manually add a firewall rule to allow java.exe to access the network. This is something that prevented some users from connecting JGecko U successfully. After adding the firewall rule, the connection should work fine.

Donator features

Since the application took months or even years to develop and I worked on it alone, I made some features of JGecko U donator only. If you appreciate this application and want to unlock extra features (mainly useful for code creation and development), feel free to become a donator on the Donator tab in JGecko U. The following features will become available after donator license activation:

Disassembler

• Add Dump Registers Hook: Adds an assembly hook to dump values of registers of interest
• Add Dump Structures Hook: Adds an assembly hook dump structures of interest
• Insert Hook: Allows inserting assembly instructions at the current address in the disassembler (performs a jump to the injected assembly and a jump to safely return after execution)
• Delete Hook: Removes an inserted hook again
• Parse Immediate: Finds corresponding lis/ori or lis/addi etc. pairs (which setup the same register) and gets the address referenced by both of them

Cafe Code Creation

• Code Wizard: Supports creating all codetypes via easy to use dialogs and input components

General

• Watchlist: Allows watching the current values of multiple addresses (including pointer support and view modes)

Assembly

• Obfuscate Assembly: Allows obfuscating assembly sources with mathematical tricks to make reverse engineering hard (note: this feature is experimental and may not be completely stable. Intended to be used on simple and short assembly RAM writes)
• Parse IDA Pro ASM File: Allows loading assembly instructions from an IDA Pro .asm file

View Modes

• Memory Viewer View Mode: Allows switching the view mode of all data in the memory viewer
• Search Tab View Mode: Allows switching the view mode of all results in the search tab

Feature Requests/Problems

You can post them in one of the following places:

• GitHub issues
• Discord

Note:

The following types of requests will NOT be answered:

• Requests for code creation or sharing codes (-> this is not related to bugs or features of JGecko U)
• Reports regarding codes not working correctly (-> unless you can prove that there is a code handler bug)
• Requests regarding connection problems (-> follow the setup guide and verify your network/IP address(es))
• Requests regarding learning how to get started with making codes (-> watch/read tutorials like the ones on my YouTube channel first)

Credits

Check the About tab in JGecko U.