I am not a fan of shadow tag so I am probably a bit biased in this matter. Still, I think Gengarite should be banned from OU play.
Gengar is too powerful to have shadow tag. MGar would be balanced if it got intimidate or something but shadow tag on something so powerful as gengar is very unhealthy for the metagame. It hurts the diveristy of playstyles. Offensive teams can deal with gengar because they can usually spare a poke, but defensive teams are hit hard by a powerful shadow tag user. You can't play around it, because if it can kill something, it will kill it. It can single handedly break down entire defensive cores.
The fact that it needs a turn to mega-evolve is essentially a non-issue. It's not hard to mega evolve. Just use substitute when you are matched up against something slower than you (every defensive pokemon). If MGar stays I think not many people would risk bringing defensive teams to tournaments, and the nature of the metagame would lean even further towards offense.
The real question is, do we use the power of banning to make stall more viable? I think Chou Toshio made a survey at the end of the BW2 era, and that was one of the questions. If I remember correctly, the results indicated that "yes" was the most favoured answer.
Gengar is too powerful to have shadow tag. MGar would be balanced if it got intimidate or something but shadow tag on something so powerful as gengar is very unhealthy for the metagame. It hurts the diveristy of playstyles. Offensive teams can deal with gengar because they can usually spare a poke, but defensive teams are hit hard by a powerful shadow tag user. You can't play around it, because if it can kill something, it will kill it. It can single handedly break down entire defensive cores.
The fact that it needs a turn to mega-evolve is essentially a non-issue. It's not hard to mega evolve. Just use substitute when you are matched up against something slower than you (every defensive pokemon). If MGar stays I think not many people would risk bringing defensive teams to tournaments, and the nature of the metagame would lean even further towards offense.
The real question is, do we use the power of banning to make stall more viable? I think Chou Toshio made a survey at the end of the BW2 era, and that was one of the questions. If I remember correctly, the results indicated that "yes" was the most favoured answer.