Meteos (DS) introduced the first 10 Meteos types; Air, Fire, H20, Soil, Iron, Zap, Herb, Zoo, Glow and Dark. It also introduced two Rare Meteos; Soul and Time.
Meteos Online introduced two further Meteos types; Ice and Poison. It also introduced a third Rare Meteo: Chi.
Meteos Wars did away with Rare Meteos, along with replacing Poison with Dust.