>>3989097The Etrian Odyssey games let you have a whole RPG party of shotas if you can handle an old school dungeon crawler.
There's also pretty much every game by Level-5.
If you want something more obscure there's Gotcha Force on Gamecube, an arena fighter with a mostly shota cast that battle each other with living toy robots you can collect and customize, though note the gameplay and difficultly is very simple and the english dub is often criticized for terrible voice acting due to the fact they got literal children to voice the characters.