Well, for one the app it’s self likely isn’t legal because it’s using the Jojo IP. I’m not too sure if it’s made to make a profit, if so, then yeah it’s likely illegal. However using the figures themselves also may be illegal? I’m not sure on that since they are copyrighted characters. However, at the very least it’s very immoral since I’m guessing they didn’t ask Nicky and whoever else made the figures to use them. Explosive Bullet had to call out a game for using his characters recently. So overall, if the figures were mine, I would try and get the game taken down or at the very least get a cut of the profit from the game. Just because the figures are on the site doesn’t mean they can be used in certain situations where the creator won’t get at the very least a credit or cut of profit.