Alright. I'm going to put in a lot of effort in this...
1. OBVIOUSLY, the Pure hearts are being used. If not it would be a stomp. Why would you think otherwise. Do we assume that Goku doesn't get to use SSJG? Do we assume any other sonic barring this one (tbh, how can he keep them on him at all times? He's not wearing anything to keep them in anyway unless he used hammerspace) can't use Super, Darkspine, Hyper, etc? Do we assume that Mewtwo and Charizard can't use Mega stones? Do we assume Digimon can't Digivolve? That Asriel has to gather souls first? No. Your only arguement is that they need to be together.
2. He's saying base Archie sonic couldn't beat SMG mario. Base Archie is only 4-A while SMG Mario is 3-C, so in a speed equalized match between the two, who would win? Neither. Stalemate due to Sonic's Durability. Regardless, base is nowhere close to Multiversal. Heck, not even Super is multiversal, despite your claims. He's only multi-universal.
3. Ever heard of cinematic timing when it comes to speed? Look at DB for an example.