VTs aren't showable because they aren't symmetrical. In case anyone was still looking for that answer.
My membership to the IBC is up. Will renew next season if I show.
And LadyVictorian, I'm afraid it doesn't work that way entirely. VTs will have to be crossed for color but the form may never get on track but since there's no IBC standard we don't have much to work with unless people are showing with bettas4all in Europe.
Who am I? Well I am a Junior Member of the International Betta Congress and a breeder of white HMPKs, red dragon HMPKs, black/red dragon HMPKs, metallic multi HMPKs, blue masked HMPKs, and now multi color HMs. Soon to add black HMs. I will be showing in New Breeder class in fall of 2012.