Rush is from the Bandai Tamashii Nations D-Arts Mega Man/Rock Man line. Rush is Mega Man’s trust robot dog. This set was released on the 25th Anniversary of the franchise. The figures are a little big for 1:18 but the other figures in this line are way too large.
This set is pretty expensive now. Amazon has it for about $100 at the moment. E-Bay isn’t much better on price for the set. I got mine from HLJ.com 6 yearsish ago. It actually was returned to them so I ended up paying shipping from Japan twice.