Sterling is a Project Mew trial competitor that entered the survival game mission in the Sea Kinsetsu in the Houen region. He paired up with Lyla and they defeated all the other challengers until they faced
Goh and
Horace. He placed third in that challenge.
After all the challengers reconvened, it was revealed that he had 8 Project Mew Tokens, seven of which were earned in previous challenges.