New Rule: If you want to change your team in any way after your team has been approved, you can but you must let ZhengTann and I know that you have done so by posting in the convo what changes you have made so we can check the changes for legality. After signups close, the teams are locked. This is done so if you regret some decision you made, you can go ahead and change that thing no worries. If you do not let us know if you change then you could be liable for punishment of some sort.
This does not mean you can go ahead and give your team a major overhaul or something so you can get an advantage or whatever though. A change of a mon is fine but keep it similar to the team you were initially approved though otherwise we will probably say no (I will keep track of this with a notepad containing everyone's teams).