1. Think about the show, most Pokemon that do not want to be captured hit the ball back painfully towards the trainer, if the pokeball was invisible they could neither dodge it or hit it back letting you capture them. It is corrosive because of what they did to make it invisible.
2. It is augmented reality, you could technically have it set up where you wouldn't even need figurines to make it work. Just holographic "wild" Pokemon generated on the glasses.
Romans 8:31 What, then, shall we say in response to this? If God is for us, who can be against us?
1 Corinthians 13:1-3 If I speak in the tongues of men or of angels, but do not have love, I am only a resounding gong or a clanging cymbal. If I have the gift of prophecy and can fathom all mysteries and all knowledge, and if I have a faith that can move mountains, but do not have love, I am nothing. If I give all I possess to the poor and give over my body to hardship that I may boast, but do not have love, I gain nothing.