I've got Golvellius and I had Aerial Assault some years ago as a gamegear title and it was damn fun so I will nail that eventually. I've been kind of curious about Sub Attack so I'll have to fire up MEKA and give it a roll.

I know about that 'monica' junk they did with Wonderboy. I have Wonderboy 3, 'Monsterland' I think was #2 called Wonderboy in Monsterland which was a sidescroller, he had blonde hair, and you had a time limit and had to pick up hourglasses to extend it. That game played in stages that had endings with bonus points. Wonderboy 3 is a larger scale password save adventure that's similar but none of the time, etc limits of being an arcade game.

Thankfully brazilian junk works on the US SMS too (seems they all do except like 3 PAL titles and the JP stuff.) Street Fighter 2, Chuck Rock, Battletoads(aka: Battlemaniacs) and a few others look extremely fun at least in 'ROM' format.