Sonic hates TV, so he desided to destroy every single monitor on South Island =)
Monitors list:
Green Hill = 10+10+20
Marble = 10+11+7
Spring Yard = 6+3+11
Labyrinth = 5+9+17
Star Light = 15+8+17
Scrap Brain = 15+15(+7 in walls)+7
Total = 196 monitors (+7 hidden ones)
P.S.: there are 3 more monitors in the walls, but you can't reach them =(