It's been a while since I took one of these "series" shots... so here's one I love: SD The Great Battle. A long running series of Gundam / Ultraman / Kamen Rider crossovers that have experimented with countless genres. Note that there are a ton of SD Hero crossover games, so to keep things simple I limited this set to just the games with "Great Battle" in the title, disregarding the sports games and stuff like SD Hero Soukessen. The only game in the series I don't have is the one on GBC which is a turn based game... as for which is my favorite, well, this might sound kinda cheap since I just got it, but honestly I've REALLY taken a liking to GB Gaiden: Tekkyu Fight for Game Boy, I think it's an awesome game. In fact I love it so much I'm working on a speedrun for it, the only speedrun of it to exist... my current time is 12:52, by the way, deathless... in case anyone else has the game and wanted to try helping me speedrun it. Besides that, can't go wrong with the rare gem that is Great Battle V on SFC.