Actually, the fact that it's not correct might work better for what I had in mind for the pic. Lala's not really a part of Team Rocket just like Nyuu's not a pokemon. People just think that Nyuu looks like one, which she's not entire happy about. The way I imagined it, Lala threw together a Team Rocket outfit as part of a poorly thought out joke. Not being much for details, it makes sense she might fudge the colors.
The horn was from the old Creature Creation Pack [link] I also used the same horn for all the tail spikes.
The ear morphs are from the Aiko & Hiro Morph Expansion & Horn Pack [link]
The tail is BushyTail2 by LittleDragon. It used to be a freebie at Renderosity, but I don't think it's there anymore. The balls on the tail are just two of the balls that come with Poser that I parented to the tail.