The answers to this question should be based on opinion. Question: If I have a Mewtwo level 100, and it knows Psychic, Earthquake, Ice Beam, and Thunderbolt, should I delete Earthquake and replace it with Shadow Ball? My reason for not doing so is that Psychic compensates for where Shadow Ball would be useful. Please send in your opinion and why so that I can make my team as powerful as possible. Thanks.