This is the worst bakugan season in character writing and story development. We got 3 seasons with Dan already matured as leader, suddenly we got him as an overproud egoist leader in season 4, making all his character build to waste. "Leader must not trouble members, I've to solve my problem on my own" excuse me, Dan, you and members fought deadly battles in every season. I couldn't believe this Mechtogan concept. They appear out of bond between bakugan and human after all this time? It went berserk the first time it got summoned, how can you call it the fruits of bond? This whole season is justadding giant mechs and giga giant mechs + bakugan controlling mechs. Do you even need bakugan for these mechas that can move by theirself?

SPOILER

The last season for Battle Brawlers, intended to have many fanservice, but nothing hits except Spectra imo.
Runo would be great if she had more lovey dovey part with Dan.
Also, those Aquos and Zephyros partners of Marucho and Shun, I laughed so hard because they didn't even meet and just died. Diablo and Phoenix weren't given any lines, what a bummer.
Now that I think of it, are they fix dead, or got revived after the 'most logical mechtogan concept on the show that also absorbed dead bakugan energies like scenes from Digimon' got defeated?