I'll leave this here because it could be relevant, and because the thread was 404'd
The info i can give:
- The 3 starters are monotype and evolve into monotypes too, that's why it's so hard to guess the secondary type they're going to have
- They are monotype because of armor evolutions, this type of evolution is exactly the same as mega-evolution, they wanted to introduce that mechanic again but with other name so instead of mega-stones y just use pieces of armor to armor-evolve. Armor evolution comes from the great britain history plus industrial influence.
- The 3 starters are monotype because they will all get iron type as secondary as they armor-evolve, Scorbunny armor evolves with a jetpack, Growkey armor evolves with amplifiers and Sobble armor-evolves with a turbine
-Scorubunny has the typical 2 evolutions of every starter and also a armor evolution based on a astronaut.
-Growkey seems to use a Flute in his following evolutions and it's armor evolution has amplifiers as shoulder pads
-Sobble evolves into a big slender chameleon, in his armor evolution he resembles a spy submarine
The hidden abilities of the starters are the following:
-Scorbunny - Momentum: If scorbunny makes a supereffective attack raises the speed one level
-Growkey - Baton: All sound type (not a new type, just that category of move) moves have priority if used by growkey
-Sobble - Camouflage: Raises evasion one level in rain