They weren't running out of steam they were holding back. Absolutely amazing episode, hype from the second the OP ended. Lot's of interesting shots throughout and breakneck pacing from start to finish.
Also Super Alloy Z Bamboo Spears (and frying pan.)
Well, the enemies have the upper hand now as they completely overpower the Kurogame house. Kouji is getting spanked by the numberless mechanical beasts and even Sayaka is getting knocked around a bit... All that craziness is clashing all at once in this final battle.
"We're characters who exist to get beaten, that makes us invincible" - Boss (also dat blast off)
Not gonna lie I was a little happy when B Team died, and a little sad when they didn't. All the stuff that carried over from ep 1 was still awesome Pygman, Big Bang Punching the Ghoul and crashing it into Ashura's fortress. Kenzo's and Hell King's reveal at the end was great.
That's slightly more hopeful then the end of ep 26 suggested, I like that they still left it open ended though. Everything past the title card was pure misdirection.
Mazinger Z: The Impact (Ep 1-26)
Music - Solid throughout and at times exceptional, frames the action and mood of the show perfectly. OPs and EDs are all solid and used to good effect as highlights as well.
Visuals - Animation is low-key but used to good effect throughout. I thought there were a multitude of creative shots and interesting perspectives used to keep the show visually interesting throughout. Felt that the show handled scale very well. Mecha design was extremely varied.
Action - 'The Impact' says it all, battles are rarely drawn out and generally decided very quickly, which is actually kind of refreshing. Only downside was that we had a lot of cool looking mechas that basically showed up and got blown up immediately.
Did not see that one coming! The heroes out smarted the villians... wait, no? The crazy twists and turns along the way made that one impossible to predict. Overall, the shaw was definately up there on a pure "entertaimment" level, but it was just pire insanity along the way with over-the-top characters and story elements.