There's this game I used to play as a kid 7-10 years ago on the DS. All I can remember is that you could get into these sort of mech battles where you are on the inside of your mech and had to pick up ammunition and stuff to launch at your opponents mech by dropping it in a tube or something. I think you could even launch yourself to the enemy mech and destroy / damage it from the inside. And for some reason I also remember there were cats as enemies or allies. Really hope one of y'all knows this game despite the lack of description, I played the heck outta that game.