Pikachu (PW3) (Korean) [Pikachu World Collection Promos] The Next Adventure then you can Special Summon

then you can Special Summon as many "Hippo Tokens" (Beast-Type/EARTH/Level 1/ATK 0/DEF 0) as possible

Set: OTS Tournament Pack 7 Card type: Effect Monster Rarity: Super Rare Attack: 0 Defense: 0 If a monster(s) is Special Summoned from the Extra Deck (except during the Damage Step): You can Tribute this card

Set: Duelist League Demo 2010 Card type: Equip Spell Rarity: Common The equipped monster gains 1000 ATK

Set: Legendary Decks II Card type: Effect Monster Rarity: Common Attack: 1600 Defense: 1000 While you have 1 or less cards in your hand

or Special Summoned by Tributing 1 Level 10 "Ultimate Crystal" monster (in which case you do not use "Polymerization")

Pikachu (PW3) (Korean) [Pikachu World Collection Promos] The Next Adventure then you can Special SummonSet: Pikachu World Collection Promos Type: Lightning Rarity: Promo Retreat cost: Colorless