Tower of Trials is a Rogue-like mod of Paper Mario: TTYD by Jdaster64. In it, Mario storms the newly-renovated Hooktail Castle, fighting through a battery of enemy encounters and building up an arsenal of party members, moves, badges and other rewards!
By Jdaster64.
Find out more at https://bit.ly/tower-of-trials-guide.
Its source code is at https://github.com/jdaster64/ttyd-tot/releases.