I love it ,
it looks with that appealing colors and the very small size like a perfect base for a nice Kids bike.
Can you please measure the size? To me the Hammer was available regularly just with 16" smallest size, this looks smaller.
The components like SID and 4Arm BCD 104 Bontrager Cranks seem to be a bit younger than the frame which has still a cantilever cable stop bridge (as used till 1996).
I bought a Hammer Race for a winter commuter build in the mid 2000's to replace a cracked frame. I found it underwhelming compared to earlier rocky mountains. It looked like the OP's version, but without the flames. Maybe an aftermarket customizeation?