He didn't. He wasn't close to dying (Kami healed him before he passed out).
Anyways, he was weaker than he was at Beginning of DBZ. Not a whole lot tho due to Goku slowing down to becoming a family man.
Toei already knew about Piccolo's growth beforehand so they added in some filler showing he was always good at heart, but highly influenced by his father's will.
Definitely Seto Kaiba. While he is generally cold in the Japanese version (particularly towards Jonouchi), he was more of a determined hardworker and had great respect for Yugi as a respect.
In the dub, he's a shittalking dickhead who just absolutely HATES Yugi and his friends for no real reason.
This is what I'm guessing we'll be getting for DLC
DLC4:
Super Saiyan Bardock
Pikkon
Supreme Kai/Shin
Kibito Kai
Saulza
Zangya
Chi-Chi (Kid)
Chi-Chi (Early)
Nam
Android 8
General Blue
Devilman
Grandpa Gohan
Mercenary Tao
Cyborg Tao
Pilaf Machine
Pilaf Machine (Fused)
King Piccolo
Tambourine...