You can target any creature with Reptilian Recruiter’s triggered ability. Whether or not the ability does anything when it resolves will depend on whether that creature’s power is 2 or less or if you control another Lizard at the time the ability resolves.
Trample
When this creature enters, choose target creature. If that creature's power is 2 or less or if you control another Lizard, gain control of that creature until end of turn, untap it, and it gains haste until end of turn.
