I used to main Shaco jungle. Here are some tips to playing vs. him.
First, you know he is going to invade your red, because almost all Shaco start blue. So have your top/bot lanes ward the bush at 1:50 and pay attention to it.
Second, Shaco won't start your buff until he sees you, the goal to Shaco is to use the least amount of effort in getting that buff. So when you head to your red, ward that bush immediately.
Third, do not approach the camps from the normal means of travel. Approach red bush from Baron side, rather than Raptors, he is expecting you to run a normal route, and if you ward the back-end of that bush, you will be able to see him before he sees you.
Fourth, tell your mid/top or bot lanes ahead of time ("Be ready to collapse on red, ez first kill"). Because when I am not playing jungle and we vs. a Shaco, I can guarantee first blood every game if he invades. Because in Bronze, most people don't ping, so if I leave my mid lane and Shaco doesn't know, gg.
Fifth, try to hit level 2 before challenging Shaco in the jungle because he has escape. Try hard engage to deal the most damage asap. You want to push him to recall and allow for yourself or your jungler to smite his wolves, or steal his red.
This isn't always how it happens, but most Shaco players play the same. Shaco is not broken in any way, because he is insanely squishy and MOST people don't build him properly. If Shaco gets behind early, it's gg because he is not good at reversing the roles when he is behind. He is build heavy on his success, and the more you hinder his clears/ganks, the better off you are. So if you manage first blood on him, PLAY AGGRESSIVE. You gotta counter jungle him. If he died at your red, run to his red immediately and camp it. Shaco at level 2 will need his Box to start Red, therefore he probably won't Box the bush. If you beat him there, just ward Red and wait. He will take a lot of damage from Red camp if he doesn't juggle the Box and his AA's properly. So jump him when he is low, and bam, 2-0 early game. Clear his camps and it's gg. Shaco at 0-2 with no camps to clear will be very hard pressed to bring that back unless the game drags on for awhile. This is just from my experience in Bronze/Silver elo.
Well, I hope this helps.