I'm trying to identify which Jaeger had the most Kaiju kills. On screen Gipsy Danger had the most Kaiju kills with 9 but it seemed that some of the others had been battling (off screen) for years while Gipsy was 'in retirement'. I think Striker Eureka is said to have 10 but haven't been able to identify other's tallies.
As you can see, the official "Trading Cards" for the film Pacific Rim come complete with a Kaiju kill count;
Striker Eureka has the highest number of on- and off-screen kills with 11.
The Pacific Rim wikia contains a complete listing of all kills made