I got this trick for Mega Man Home Page.
You can get more trick about all of Mega Man on that Page.

You can use the Tag Chip system to help you make Program Advances easier. Of the three chips required for the Program Advance, make one your Regular Chip and the other two your Tag Chips. Then you just need one of the two chips to come up in the random draw and you’ve got all three.
Remember places that give a description saying there is a jack-in port but you can’t use it right now. Keep checking them in the future.
You can use your Link Navis to get past specific obstacles that block areas of the Net. For example, SpoutMan can take care of the raging waterspouts, and TenguMan can eliminate cyclones, and so forth. Just analyze the obstacles and try to match them according to the Navi, and it should be fairly obvious who to use for what.
There are several invisible paths in this game, like previous ones. Try walking into the edge of any suspicious area.
Buy coffee every time you go past a Net Cafe. Really, it’s useful.
The seemingly random strings of “RLBA” characters that you sometimes uncover are Compression Codes. Use these in the Navi Customizer. To use one, highlight the associated part in the list, then hold Right on the control pad and input the given button sequence (L and R are the shoulder buttons).
There are some new panel effects that you can take advantage of. For example, use an Aqua-based attack on someone standing on an ice panel, and it will freeze him.
Remember that certain situations can alter weak points for both you and your foes. For example, an enemy standing on grass will take double damage from Fire attacks, even if he’s not normally weak against fire. An enemy in a bubble will take double damage from Electric. And so forth.
There’s a new “feature” with the Navi Customizer which allows you to place parts off the grid. You will still bug MegaMan doing this, so it’s not something they totally overlooked. It’s just weird. Having said that, with some creativity and a BugStop, you can exploit this delightfully.

You can playing that GBA game for PC to.
1. Search "GBA Emulator Visual-Boy-Adventure" at Google.
2. Download Visual Boy Adventure on your PC.
3. You can download the rom for Cool Rom or Rom Hustler.