Suggested parts for taking on Wily: the Counter Wing (Napalm Man’s) for getting more items (items are the key to winning), and tires which will either allow you to drive faster on dirt (such as Guts Man’s), or drive across deceleration zones (such as Napalm Man’s). Tires that are immune to mines are also useful. Naturally Wily’s tires work pretty well here (it is his course). However they lose speed on just about everything, so I personally recommend using Guts Man’s Press Tires instead. Also if you have an attack that does not require charging (such as Mega Man’s or Shadow Man’s), you can easily beat on Wily’s Barrier until it falls and then start harming him with attacks.