Okay, so i used to play this game on the plastation 2 in the snes station. It was a 2d beat em up rpg type of game where you could chose different classes like a mage or a warrior. You fought monster and bosses, and you would get experience from killing those monsters, and when your xp bar was full you would go up a level and you would gain a new ability, for example the mage has a bigger fireball that can go further now. I don't remember if you changed clothes but i think you did. You could play co op and i think single player(though i only remember playing with my friend). You could open chests you found on the way, and one player could get stronger than the other. The game was progressive, you fought monsters, leveled up, fought a boss, then went to the next stage/area with(i think) the same hp and started fighting different monsters from that stage till you got their boss again. It's like a story of the heroes climbing up the ranks, defeating monsters.

Again, it was a 2d beat um up rpg game from the snes station where the main cool thing was each level up gave you a new ability.