i7 2600K, and no graphics card? 
Just adding on to what Starscream said, there's an easy way to test when your GPU is the bottleneck. Turn off AA and set your IR to 1x. Note the game speed and frame rate. Try it at 1.5x, note the speed and frame rates. Rinse and repeat. When you notice a drop in performance, that's when the GPU is bottlenecking your hardware. At any rate, the i7 2600K is a beast, especially when OC'ed, so you're better off getting yourself a decent GPU regardless.
Iirc, Pokemon Battle Revolution is a surprisingly demanding game to get full-speed in, though you should be able to get it with a better GPU.
Just adding on to what Starscream said, there's an easy way to test when your GPU is the bottleneck. Turn off AA and set your IR to 1x. Note the game speed and frame rate. Try it at 1.5x, note the speed and frame rates. Rinse and repeat. When you notice a drop in performance, that's when the GPU is bottlenecking your hardware. At any rate, the i7 2600K is a beast, especially when OC'ed, so you're better off getting yourself a decent GPU regardless.
Iirc, Pokemon Battle Revolution is a surprisingly demanding game to get full-speed in, though you should be able to get it with a better GPU.