BoMF is right about the off-screen take-out on Snipey Joe. When he's gone, you can take care of the mole by aiming properly with the buster, while Rush is digging. The moment it pops up, shoot, then jump and shoot again while its airborne and shoot one more time when it re-appears. If you're fast enough, you can take it down before the mole digs back into the ground again. I do it without the Power Shot.
What I don't understand is why people depended on save states to get that CD. I did it easily on my Super Famicom and the Game Boy Player. Even though there's some kind of annoyance level with the CD & enemy placement, if you have sexcellent buster shot precision, it isn't as tough as you think.
If you're unsure of when the mole will show up, take a few steps to the right until you see the mole and QUICKLY turn back (while it's still airborne). You now have an idea of where the respawn for the mole is, and whenever you're ready, use your buster to take it down, switch to Rush Search, let him dig and remember to shoot the mole when it shows up again.
Before you dig, you can use Lightning Bolt to get rid of the moles and Joe. ^^
Mega Man & Bass was hard?
Finally someone who agrees with me~ *high 5* ^.^O
The rest of you, watch my theme week video. </wii>