The first game I 100%ed was a very obscure GBA game: Medabots- Rokusho vs. AX. After winning with Rokusho and his partner Brass (plus several other potential pieces and characters to mix and match with) at the Medabots tournament, the Rubber Robo Gang steals the prize Medabot, and Rokusho's shooting counterpart, Arcbeetle. I had to fight each and every RRG member in deathmatches to win each piece of Arcbeetle and thier own Medabots back. I obtained several of my favorite fighters this way; Mega-Emperor is the prominent one. I actually did it twice in the time I've had it because I restarted accidently, but I've earned all 12 medals (The cores of the Medabots and the key to Medaforces) and all 120 parts (30 different characters).
Recently (yes, I still play it), I've been using Arcbeetle, Mega-Emperor, Sumilidon, and Belzelga to their potentials. Belzelga is in particular hard to use because of his exploding arm missiles destroying the arm in the process, and his Helmet only has 3 respawns-of-armor.
I've also 100%ed LeafGreen, Diamond, YuGiOh WC 2010: Reverse of Arcadia, and PMD: Darkness Version. (Most recently, YGO WC 2010).
Does anyone else play Medabots VGs on this site?
~AoH