pokemon card zangoose (14/100) [EX: Sandstorm] – Board Wipe Colorless Chop Up (50) Does 10 damage to each of your opponents Benched Pokémon that has any damage counters on it Zangoose 120 - Reverse Holofoil

For example, repeatedly recurring and recasting Kokusho with Phyrexian Reclamation is far more mana-efficient than recasting it from the command zone, because Kokusho costs an additional 2 mana for each time you've previously cast it from the command zone (commander tax)

Here's what is known so far

The decision to exclude promo Pikachu from the set was probably taken in the last minute when WotC decided to release the card as part of their promotion for the Pokmon League instead, and some made it into packs and boxes before the production process could be adjusted to remove these cards after cutting

Once the ability triggers, raising that creatures power above 2 wont affect that ability

WOTC has printed a couple of cards that make fun of this

Gale Force One plays a little game of switcheroo with players permanents when you attack with enough fliers, giving you full control over what gets moved around