A: Possibly, but it's difficult. Dolphin netplay desyncs often with multiplayer shooters. Official Nintendo Wi-Fi Connection was shut down in 2014. You would need a private server (Wiimmfi) and a specific patched ISO.
Some developers release (e.g., Call of Duty: Wii Mod ) that require a legal ISO. You patch your own dump—no piracy needed. Call Of Duty Black Ops Wii Iso Highly Compressed
Removes "garbage" or "padding" data to save space without losing game quality. Variable (Smaller) A: Possibly, but it's difficult
Aggressive compression (e.g., compressing a 4GB game to 200MB) often requires deleting critical game assets. You may encounter: Call Of Duty Black Ops Wii Iso Highly Compressed
For Black Ops specifically: