Chat with our AI personalities
You have to go to sunyshore city and go to the pokemart, there you will find the man who sells the pokeball seals. If you want to know where to get the seal case you have to go to the city with ruins and find the boy inside the cave, then go to his house and talk to his mom and get a pokeball seal case! Hope this helped!
You can't. However, you can change the ball capsule in some games. Once you get a Seal Case and Some Seals, you can edit pokeballs on PCs.
Technically you can not trade on the GamBoid however you can transfer your saves onto your PC trade/battle then transfer them back to your phone. (See related link below for a tutorial on how.)
Trade.
You have to transfer it or you can trade for it.