
How about a logical explanation

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Pete starts tearing off his costume, thus causing the symbiont pain. When he gets to the ''lower'' parts of the suit, the goo just slides of him to prevent more damage and it falls onto Brock. Pete manages to run away from the scene with the lower part of the suit, that is now originally blue-red. He switches clothes quickly at home and makes it to the dinner with MJ, where he gets into a fight with GG2 (we see him in a formal wear). The next day, Harry is in the hospital or somewhere else, who cares, and MJ and Pete make up, and she makes him a new suit (like you guys said), which he uses in the Battle Royále

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.....Ok, I know, too much imagination...just ignore me

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Any***