Hmm, no, probably not a tumor and he's getting faint pineconing too. :(
With Ramesses, I'd suggest trying an antiparasite med such as General Cure if we haven't already. If we have . . . then maybe try it again. But if he's bloated because he has a blockage somewhere in his intestinal tract, then I honestly don't know what more we can try short of surgery. I'd maintain the high dose of epsom salts and if he will eat, maybe try something higher fiber such as brine shrimp or daphnia.
For Psusennes, my biggest concern is that the fin rot came too close to his body and went internal. I do see some really encouraging growth at the front of his anal fin but that blackish part near the rear is worrying me. Keep an eye on him for a day or two, maybe add the 1 tsp of AQ salt but if the sluggishness continues we may want to try him back on Kanaplex for 3 doses in case the rot bacteria DID go internal.
Gagh, why do betta fish have to get sick so easily? :(