Newest Translations

Shin Megami Tensei if... Final Fantasy Tactics Kyattou Ninden Teyandee Shin Megami Tensei if...

Newest Reviews

Romance of the Three Kingdoms II NameStatFix Mortal Kombat Arcade Edition Enhanced Super Hydlide - Refined and Rebalanced Daytona USA - Arcade OST

Featured Hack Images

Rockman Deus Ex Machina FF 1 and 2 DOS: Mod of Balance Step Dance Phantasy Star II (Japan) Music Improvement

Featured Translation Images

Harry Potter 3 Chaos Seed: Fuusui Kairouki Fire Emblem: Seisen no Keifu Bomberman

Recent Updates

Mario Tennis - All Nintendo Characters Unlocked

Hack of Mario Tennis


Mario Tennis is a fun portable tennis experience, but, despite him being in the title, the game does not even let you play with Mario from the beginning! It also has nearly half the roster locked behind antique DLC mechanics as you need a transfer pak and both the GBC version of Mario Tennis and the N64 version of Mario Tennis to unlock all Nintendo characters.

This hack will make all Nintendo characters available from the start of the game.

It is to be noted that this hack does not make any changes to your save file, so you could still go through the steps that would unlock Mario and Peach and retaining this progress (as well as other progress data) when switching back to an unpatched rom.

This patch has only been tested with the USA rom but should work with the European rom as the roms are identical except for some minor bytes.

Note: Warehouse Court unlocks after beating all the other Mario characters with a Mario Character.

ROM / ISO Information:

  • Database match: Mario Tennis (USA)
  • Database: No-Intro: Game Boy/Color (v. 20210227-015730)
  • File/ROM SHA-1: 414BA58340A27FC27B127BC01455B32764151FF0
  • File/ROM CRC32: A781C63C



RHDN Hack ImageRHDN Hack ImageRHDN Hack Image


ContributorType of contributionListed credit

User Review Information

This is a hack you need.

Reviewed By: MichalGrodal2 on 28 Oct 2022

When this game was released, it had a paywall, which was that you had to get a N64, Mario Tennis 64, and a transfer pak to unlock everything. Flash Carts are almost incapable of using the Transfer Pak, so either you’ll have to waste a 100 dollars to get this thing running, or you could just get this hack, which does what it accomplishes to do. All the characters are unlocked, all the mini-games, and if you want, you can still do story mode and unlock Peach and Mario. All in all, this is a hack that fixes a lot with the game.

My only problem is that Warehouse Court is not unlocked, as the only way to get it is via Transfer Pak, and if it was then this would be the definitive version of GBC Mario Tennis.

  • EDIT*

I found that the person fixed this problem. Now I can full heartedly support this hack.

Version 1.2 Recommended - Yes

User Reviews
An Okay Hack With a FlawConnrade17 Oct 20221.2Yes
This is a hack you need.MichalGrodal228 Oct 20221.2Yes
A patch that you need for your flashcart.Chronosplit12 Oct 20221.2Yes