adding to your hand includes drawing it from a card effect like upstart goblin right? so if thats the case then loads. plus im sure there are a few cards that can search fairies.....
well i guess the card that works perfectly with watapon would be court of justice...
as for ftk... i cant think how that would work
oh wow u know how every synchro monster is supposed to be TCG now right?
well i just found 1 that isnt it has the same effect as victory dragon so i suspect it would be banned when and if it gets released. its called stardust divinity lv 10 light fairy synchro monster
http://yugioh.wikia.com/wiki/Stardust_Divinity
tyr the vanquishing warlord has the same effect too o.o wow and queen of fate - eternia has the same effect tooo omg there are 4 cards with the same eff of if that card makes ur opponent lifepoints 0 by battle u win the match 4 CARDS and only 1 is released and its banned - Victory Dragon... woah
ok ok ok back to topic (sorry went off a bit there)
hmm cards to search watapon.... i guess only sangan can do that
i think rai mei can too... but it would be in damage step so watapon wont be able to activate..
the easiest way i think is to draw into it via card effect like upstart or reckless