It is in packs of Phantom Darkness.
Rainbow Neos is a fusion of Elemental Hero Neos, and either Rainbow Dragon, or Rainbow Dark Dragon.
Rainbow Dark Dragon is a secret rare in Phantom Darkness.
"Rainbow Dragon" was released in the TCG booster pack Tactical Evolution.
I would have to say the rainbow dark dragon because dark is a lot better like black people are better at sports than white people.
Rainbow Dragon is Common in Ra Yellow Mega Pack(RYMP), but rare in all other packs.
Yes, "Future Fusion" can be used for "Rainbow Neos" by sending an "Elemental Hero Neos" and a "Rainbow Dragon" or "Dark Rainbow Dragon" from your deck to the Graveyard.
You buy it from the crow booster pack.
depends on how you put together your deck or who your opponent is. if you have dark types in your deck,graveyard,and field, then i suggest rainbow dark dragon but you will not gain as much attack as rainbow dragon.although rainbow dragon gives you a lot of attack, there is not as much cards available to gain the attack and..... its complicated so ill just get to the point, they are the same if you have a regular deck that is not focused on certain monsters so like i said, depends on how you put your deck together.
It came in packs of Tactical Evolution.
You buy it from the crow booster pack.
There is one type of Rainbow Dark Dragon that was released in Phantom Darkness as a Secret Rare (PTDN-EN003). It is worth approximately 18-20 dollars.
In the world of Order, defeat each duel spirits there five times and you will unlock the booster pack "The 7 Crystals". "Rainbow Dragon" is an Ultra Rare card in that pack.