Seronis

Zero people before him. Because it already said he was the first to beat the wyvern which means no one made it this far

Its been a common thing since the 90s. Ocarina of Time a prime example

and his Int falls even further behind

This is supposed to be Marvel. Both of your suggestions are DC

The first instruction given was he could enter and exit the tower at any time. So maybe he took a break. The riddler only said the challenge ends if he FAILS to answer. Not if he waited to answer. Also timeskips. he could have beaten the entire tower at this point

door. singular. the choice only existed at the beginning. now he is on the yellow PATH and there are no more choices.

they ran towards the cafeteria but got knocked into the lab en route it had said.

Or centuries, or aeons. You have no way to know how many uncountable years passed between dieing and waking up in new body. Your ship could have long vanished

Not really. OUR world has ordinances that govern your right to tear down property. A world with magic would have even more

Team battles. Just because the artifacts they made did great doesnt mean the team did great as a whole