Gardevoir ex is not only something of a favorite Pokemon for many fans, its also a hugely popular and successful deck right now
With seven power, RMS Titanic makes enough Treasure tokens for you to re-cast it during your second main phase with the commander tax, and you'll still have one extra Treasure for later
DreamUp can help you create models even when you dont have a clear idea in mind or need inspiration
Neheb, Dreadhorde Champion can help you generate potentially tons of mana
They gave me a great amount of information, but its currently spread between all those threads
If a card specifically states that it moves Commanders from the battlefield to the Command Zone, anything that's been mutated onto your Commander moves along with it, then falls off - and will probably be stuck there, since there's no way to cast non-commander creatures from the Command Zone