I'm actually thinking my favorite is either ShinkenOh or Magiking.

I've always liked this one too, and I think part of it has to do with the fact that it had such a sci-fi vibe to it. However, my favorites are still the Thunder & Dino Megazords, especially the Black & Gold dino one. Also, and while Titanus isn't technically a Megazord, it's always been hella special to me.

possibly thunder megazord (because of ryuseioh)

Hmm this is a tough one.....I would say the Ultimate DaiZyuJin (the original Ultrazord) from Zyuranger/MMPR and the Lightspeed Rescue Supertrain Megazord cause hes basically a carrier zord and a megazord in one.

I don't know every japanese name yet, to be honest. But the original version of the Zeo Megazords. I loved Zeo zords/mecha. In all their shapes and forms. Especially the way the Zeo Megazord could switch hemlets. And definately Pyramidas. Still my favorite ranger of all time. A close second to Zeo.. would have to be Magiranger's. You have to love a Megazord/Mecha with a dragon mode.

Magiking was the one I was thinking of for Magiranger, but what were the Zeo's called?

Ohranger robo, not a particularly inspired name :lol LOVE the design though, one of my faves.

I would have guessed Oh-Oh XD

On topic, though, my favorite is definitely the Thunder Megazord. The entire assortment of Thunderzords is just awesome, and the Tor figure is freaking enormous (bigger than my toaster oven!!)

OhRanger Robo? xD What the heck kind of name is that for anything?! I know, I'll start calling it ZeoRobo! Like Giant Robo. But 5x the awesome.

Only Megazord I owned Toywise was The Omegazord from Lightspeed. Owned Mini Versions of the Q-Rex, Lightspeed Solarzord and RPM High Octane Megazord, but they were mini. Loved Omegazord because it was definitely different than anything I owned when I was young and has been a favorite of mine since.