what is better helix or dome?

Really depends on what you want, as one isn't exactly better than the other. Can't remember the names of the two Pokemon those fossils give you, but each were old. One was for attack, and the other was for defense, I believe. Just see which is better to your liking through choice. You don't like the one you picked, just reset the game from before you picked the fossil and try the other.

Forgoten dont anyhow say.....

Both defense good but i'll chose dome fossil
cause the pkmn after changing the fossil to pkmn n like the pkmn u will of cause train it right?
N if u chose that stupid snail(helix) it's speed isssssssssss rreeaall SSSLLLOOOWWW.But if u chose Kabuto,it have a great speed n all defense n special defense are around the same stats(the attack n special attack too)

Well personally i like both the same. Both are around the same is stats. Helix(ominite) had better defense and sp. attack. While dome (kabuto) i think... has better attack and sp. defense. i choose dome most of the time but i chose helix ATM at he is very good =)

ones the bird and the the other is sypter or sumink like that

the helix pokemon is pretty srong but i think the dome pokemon is sronger