That's odd, double colourless has never had any problems at any of the tournaments I've been to. As far as I know the playable cards from gen 1 are:
-double colourless,
-switch,
-computer search(limited to 1),
-full heal,
-pokeball,
-energy search(made redundant by professor's letter),
-rainbow energy
Thing is, the old Computer Search is not legal at all because the card type changed. It went from a generic Trainer (which would be equivalent to a Trainer - Item card in the modern rulesets) to a Trainer - Ace Spec, which has different rules than the standard Trainer - Item card class.
The only ruleset it'd be allowed in is Unlimited, which has no official tournaments being run for it, so it's effectively banned.
I'm pretty sure the original Double Colorless is fine because it's functionally equivalent to the currently legal one (at least, I'm 90% certain there's a currently legal print of Double Colorless Energy).
And Rainbow Energy requires that you have a reference handy that is approved by a judge.
ah so original pokemon from there cant be played anymore like kadabra or raichu?
Okay, so, you need to ditch thinking of it being restricted by what generation a Pokemon is from. Rather, you need to think of it as being restricted by what set a particular card is from, and whether the card text and card type matches that of a card from a currently legal set.
I'll quick define what a set is: it's a collection of cards released at the same time that has a specific number of cards in it, and all cards that are part of it have a special symbol on the card. On older cards, it was located just off the bottom right corner of the card art on Pokemon cards, while on trainer cards, it was in the bottom right of the card text box. On newer cards, that symbol is in the bottom right hand corner of the card next to the card's rarity symbol. The Pokemon Company International releases a new set once every four months to expand the card pool players can play with as well as to keep money flowing to keep the TCG around and profitable.
Back to defining what's play legal: Basically, anything from the set Boundaries Crossed and any of the sets newer than Boundaries Crossed are legal for tournament play right now. Anything that's an exact copy of a card released in any of those sets from an older set is also legal (the older card can have different art, though). It is not restricted by what generation a Pokemon is from in the slightest. There's a completely different reason you don't see any Kadabra cards anymore, and it apparently ties back into a lawsuit.
Does this help clarify things a bit?
EDIT: Oh! I forgot! There is one card that has been banned recently that was released sometime in the last two years. It's called Lysandre's Trump Card.