Gagaga Ganbara Knight

You can reveal 1 "Gagaga" monster in your Extra Deck; Special Summon this card from your hand, then you can apply 1 of these effects.<br>• Special Summon 1 "Gagaga" monster from your hand.<br>• Change the battle position of 1 monster on the field.<br>If this card is detached from an Xyz Monster to activate that monster's effect: You can add 1 "Gogogo" monster from your Deck to your hand. You can only use each effect of "Gagaga Ganbara Knight" once per turn.