Mario Bros. 14 Adventures is a Tiny Toon Adventures 2: Trouble in Wackyland (Japanese version) hack.
Overview[]

Gameplay.
Like Super Bros. 6, Buster Bunny (along with other characters such as Babs Bunny) is replaced with a pink Mario. The sprites were ripped from Super Mario Bros. 3. Additionally, the word "Adventures", the Japanese text, and the "Press Start" bubble were kept from the Tiny Toon Adventures 2: Trouble in Wackyland title screen, similar to how Super Bros. 6 kept the "Adventures" logo from Tiny Toon Adventures (of which it is a hack of)'s title screen.
Some cartridge labels list the number "15" despite that it still remains with a "14" in-game.
Trivia[]
- The graphics were replaced in a strange way compared to most pirate hacks. Rather than replacing each individual sprite, seven Mario graphics appear at the top of the CHR; the game was hacked to load only this CHR area, while ignoring the others. This would have required quite advanced coding to do, especially compared to the other Mario-themed hacks.