When I normal summon i cant fusion summon with that creature that was normal summoned and another creature on the field. Can I not fusion summon with a creature that was normal summoned this then. Is polymerization required?
To fusion summon a monster you need:
1. A fusion card (eg Polymerization)
2. Monsters that are listed in the fusion card.
Eg: If i want to summon E-Hero Flame Wingman, then i need to play a Polymerization magic card while also having E-Hero Burstinatrix & E-Hero Avian in the hand and/or field.
if you're trying to use red eyes fusion you can't normal summon the same turn you use that, only set.
Konami may print the cards, but Yugioh belongs to the players who've spent money on the game and kept it alive. The fact that this site doesn't belong to konami doesn't mean anything. Yugioh will exist even if Konami dies.
You need polymerization unless it states the requirements needed
You usually need Polymerization or another Fusion card unless one of the cards say something else.