The tag on the Disneyland Paris Leroy plush, which gives him the identity "Experiment 628" and uses Stitch clip art that's modified to resemble Leroy (notice the straight antennae and notched ears)
Video games[]
Leroy as a Tsum during the January 2019 Stitch's Cousin Frenzy! event in Disney Tsum Tsum; his official artwork is seen on the left
Leroy's bio from the September 2018 Stitch's Cousin Search event in the Japanese version of Disney Tsum Tsum