There was multiplayer, it just wasn't online! Rocket Slime actually had the feature that would allow people that owned a DS but not the OG game to download it through your DS onto theirs and play it temporarily. But yeah I know what you mean, I haven't played in years but I remember there really isn't much to do after all the art is back and you got the Hero Sword from the post game Arena. Gotta say though, that final boss battle is fucking amazing and has the most kickass music ever.

I probably replayed Rocket Slime more than any other game as a child. I lost my first copy as a kid. I wasn't a very fussy kid, normally I'd just roll with whatever. One of my babysitters accidentally threw away my copy of Pokemon Emerald and I just rolled with it because I didn't want my parents to spend the $10 it would have cost for the loose cart at GameStop. When I personally lost Rocket Slime though? Literally inconsolable. My Dad wasn't moved by random fussing, but he quickly recognized that this wasn't just me "losing a toy". My ass stopped playing video games for weeks until my step mom found a new copy.

Sorry, just had to rant about how much I FUCKING love this game