Rainbow Neos is a fusion of Elemental Hero Neos, and either Rainbow Dragon, or Rainbow Dark Dragon.
If the E-Hero trying to be Fusion Summoned requires a nonspecific E-Hero (such as "E-Hero Absolute Zero), then "Neos Alius" can be used. If the Fusion Monster requires "E-Hero Neos", "Neos Alius" cannot be used since its card name cannot be treated as "E-Hero Neos" while in the Graveyard. (Though this only applies to "Rainbow Neos" who actually is not a E-Hero fusion monster.)
Reborn the Monster Other wise known as Monster Reborn
Due to a bit of an oversight when Rainbow Neos was translated into English, you cannot use a Fusion Substitute in the place of Rainbow Dragon or Rainbow Dark Dragon, nor can Elemental Hero Prisma take the place of one either. The reason is, the Japanese version says it is made from "Elemental Hero Neos" and an 'Ultimate Gem Lord monster'. This wording is actually non-specific, it is not naming anything specifically, just looks for any monster with Ultimate Gem Lord in the name. You therefore can't use a substitute or Prisma in conjunction with that second component, only Elemental Hero Neos. When they translated the card into English, they just wrote Rainbow Dragon and Rainbow Dark Dragon by name, not realising it changes the way the card is played - but the card has to follow its original Japanese text, and that is how it is ruled at tournaments. So King of the Swamp can be used, but only in place of Elemental Hero Neos.
Yes, you can chain Call of the Haunted to Monster Reborn. Works great if they try to reborn your monster.
Rainbow Neos is a fusion card which you need the Elemental Hero Neos and Rainbow Dragon on the field or hand and use Polymerisation .
You use any appropriate Fusion Summon card (ie Polymerization) while you have Elemental HERO Neos and any 'Ultimate Crystal' monster such as Rainbow Dragon, either in hand or on the field.
yes there is a rainbow neos card in japan
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.
Rainbow Neos is a fusion of Elemental Hero Neos, and either Rainbow Dragon, or Rainbow Dark Dragon.
Neos Wiseman is a 'cannot be special summoned except by' monster. That means his listed summon text is the only way he can ever be summoned, and can only do it while he is in your hand. You are unable to discard him then use Monster Reborn. Also even if he is properly special summoned first, he still can't be special summoned by Monster Reborn, unlike monsters who say 'can only be special summoned by'.
If the E-Hero trying to be Fusion Summoned requires a nonspecific E-Hero (such as "E-Hero Absolute Zero), then "Neos Alius" can be used. If the Fusion Monster requires "E-Hero Neos", "Neos Alius" cannot be used since its card name cannot be treated as "E-Hero Neos" while in the Graveyard. (Though this only applies to "Rainbow Neos" who actually is not a E-Hero fusion monster.)
Yes, Rainbow Neos is the fusion
Well, the episode of Rainbow Neos has already been released and there are a lot of pictures of how Rainbow Neos looks like, he has a huge ressemblamce to Rainbow Dragon with the whats on it like the wings, hands, jewels, body, etc. While it's still got the basic shape of neos like all the Elemental Hero Neos Fusions look like.
Reborn the Monster Other wise known as Monster Reborn
yes, cards like beastking of the swamps can act as one fusion material monster, but the others have to be the exact ones.
nope