A good screen recorder would be OBS and don't forget to type /registerreports in game. Also the guidelines can be found here.Hey there @XxCHUMBINBAxX.
No it’s not allowed to teaming in solo skywars,
a screenshot is not enough evidence!
Have you screenrecorder? If you have a screen recorder you must be recored that team and upload it on youtube then you go to this site:
https://reports.cubecraft.net/report and report that people for teaming and they get a ban!