No.
In the Yu-Gi-Oh TV series The Great Laviathon is said to have infinite ATK points and Obelisk the Tormentor is said to have infinite ATK points when he activates his ability to destroy all opponents monsters when the controller sacrifices 2 of his/her monsters. In the Yu-Gi-Oh trading card game there are no monsters with infinite ATK points and expectantly there will never be one because it will end up being classed as 'forbidden' or even 'illegal'.
normally it has 4k atk and def points, but obelisk has the ability to sacrifice 2 monsters to make its atk points infinite and destroying all of the opponents monsters at the same time
No, those monsters have 'undetermined' ATK while in the deck, and can't be searched for by any card that looks for a particular ATK value.
Drak Charmer! I have him, he has Infinite ATK and Infinite DEF!
Neither, Obelisk can gain infinite power for one turn by sacrificing two monsters and Slifer, if you have the infinite hand card on the field, will eventually have over 100,000 ATK but it could kill Obelisk on it's first turn when it's out if you have 5 cards in your hand.
It has an Original ATK of '?'. This will be counted as '0' for the purposes of mathematical calculations, but not for the purpose of cards that can search for monsters with a specific ATK, Ananta can't be searched for by those.
A monster with '?' ATK will be treated as having an ATK of '0' while it is face-up on the field, if no effect is currently giving it an ATK value. It will have 0 ATK for the purposes of Damage Calculation, and for any card that affects monsters below a certain ATK.
It may be possible if you decrease the atk of the monsters used to tribute for it's summoning. This should weaken Ra as his effect take the atk and def of the monsters used to summon it and add them to his own. Then you could make sure your opponent doesn't have many lif points and they won't be able to transfer them into Ra's atk. Then orde your monsters to attack
Since both monsters are your opponent's weakest monsters, you get to pick which one your Fissure destroys.
atk is the number you use to attack you opponent. if your attack is stronger then their monsters attack or defence you destroy it. defence is used to block
The monster card with the "best"/highest ATK would be Dragon Master Knight, Five-Headed Dragon/ F.G.D., and Malefic Truth Dragon. All three monsters have 5000 ATK.
The creator of lights atk. and def. are infinite.