Two Bulborb subspecies are known to have been cut from the final versions of Pikmin 2. These bulborbs, along with the Red Bulborb, would have given each basic Pikmin type a Bulborb of the same type. had they not been removed. Naming used in the game's data makes it clear that these eventually became the Dwarf Orange and Hairy Bulborbs in the final game.
Blue Bulborb
In a prototype video of Pikmin 2, a small blue creature is visible. It is clearly a Bulborb with white spots; it apparently acts like the Dwarf Red Bulborb, with the same health, attacks and weight. Its treasure value, however, appears to be 5 Pokos, whereas Dwarf Bulborbs are worth 2 in the game's released version. An adult version was never shown.
Yellow Bulborb
Yellow Bulborbs appeared in the same video as the blue one, but in an above-ground area that bears a striking resemblance to the Forest of Hope. A dwarf version was also seen, which seems to walk slower than other Dwarf Bulborbs.