Pets:
Well here I'll walk you through a event system and if you need pictures just tell me
1) Add a event on a map
2) Change it to a graphic of a beast
3.) Add a message such as "Tame this beast and make it your pet?"
4.)Do a choice of Yes or NO
5.) Under Yes add a Varible and make it like this-http://i70.photobucket.com/albums/i103/Lordsoccer10/Pic.png[/IMG]
This varible makes the game choose a random number 0-4 (0,1,2,3,4)
6) Make a conditional branch like this-http://i70.photobucket.com/albums/i103/Lordsoccer10/pic2.png[/IMG]
7) Repeat the step above 4 more times but make the constant 1,2,3,and 4 (in different condition branches)
8) Lets say on 3 lets put a message of- YOU TAMED A BEAST!WOAH!
9)And under the message put a add actor and make the actor the animal you just tamed. This requires you to make a new actor int he actors tab.
10) For the rest of the conditional branches add a message like "You failed at taming this monster....Too Bad..."
11) Be happy you're done >.>
Menu:
That would require a script and currently there are few scripts that can be found. I'd suggest looking in google or yahoo for "Pokemon Starter Kit" and it should help...