WATCH: Union J hang out with Pikachu from Pokemon and change their name to Union XY!
They also spent the day frolicking about in Pokemon onesies and hanging out with the main man – Pikachu!
What do you think of the lads’ new name? Let us know in the comment box below.
Remember, you can listen to Fun Kids on DAB Digital Radio in London and online across the UK! Click here to listen!