Slime Morimori 2 from Japan has been retooled a little bit and will be brought to North America as Rocket Slime.
Rocket Slime is a Nintendo DS game whereas you play as the ever-loved DQ Slime character, in this case his name is Rocket.
You must save the kingdom of Slimenia from the Plob, who resemble classic DQ monsters with the addition of tails that show their rank. The more tails, the higher the rank. The Plob have kidnapped all the slimes in the capital city of Boingburg, so it is up to you to rescue them, 100 in all.