Jump Ultimate Stars.
The fatal flaw is that it is old and you need to do a lot of extra steps to play online in 2025, but aside from that, the game has a very steep learning curve so even the greatest otaku can struggle to get into it, competitively specially, if there is a room for that word in 2025 😅
Not sure if this fits (because it had its moment and its assets are likely popular) but Jump Ultimate Stars for sure.
It is basically the dream of any Otaku materialized and sadly Shounen Jump hasn’t been able to top it yet, the more time it passes the more time I appreciate it 😁
For example I have played with Gon and Killua characters since 2009… But just until now I got to see the 2011 Hunter x Hunter adaptation and oh boy, knowing the characters just improve the experience!
Customize Android root stuff, watch anime, play videogames, that has been my life as of lately.
Quite a bunch, but the ones I come more often to my mind (and that are not DS titles, if not it would be Jump Ultimate Stars, Metroid Prime Hunters or Mario Kart DS) are:
Jackie Chan Stutmaster and Toy Story 2, both PS1 games (among other PS1 titles).