To start, the goal objective should be a little more difficult, in stead of having to kill 3 monsters the total number of targets to aim for could range from 6 to 8 targets.
Obstacles should also be stronger or add additional obstacles such as the "vile spirits" located in the haunted mansion, after seeing those and there attacks I figured they would make great obstacles for the professional monster tag mode, especially considering the curse of slowness ability they have, which could make it more difficult for players to achieve their goal.
Time attack mode: be the first to "capture" and hold 6 rare monsters before opponent in less than 3 minutes, penalty if both player fail to succeed, Casper will K.O. both players leaving no one with any tokens. during game play players will be required to capture (A.K.A. kill) 6 rare monsters and survive for the remaining time limit if player is knocked out by either obstacles or other players their capture count will drop by 4, opponents will "not" be able to pick up K.O.ed players monsters (receive opponents earned points) after a successful K.O.
New types of enemies: for professional mode it could make things interesting if the monsters you fight here are different form the previous version of monster tag.Example: bats replace gnats / fliffies replace caterpillars. Or friged spirits replace gnats / frost demons (Frigus look-a-likes) replace caterpillars. Etc.New stages: if I recall correctly there are only 2 different maps used for monster tag, well to make things more interesting for those who try professional mode perhaps 2 new maps could be added, like a snow plains map or haunted mansion map.
Yeah i guess giving the caterpillars more health better and will make it more interesting. Maybe there can also be giant fliffys that shoot carrots at you!![Iif u do make these i think they should b pink!!]
actually couldn't you make a second option? like level 20+ has to click harder MT when 0-19 can do easier?