Lava,Rocko,Leshy,Splashy etc

Does anyone know where to catch them so far ive only found angelo and im breeding it

You cannot catch the rest. They must be bought from the encyclopedia/pokedex after accumulating the specified prestige and/or honor points as well as silver.

• Leshy - Need at least 75000 prestige points to buy it for 500000 silver; Second (for breeding) requires gold coins
• Roco - Need at least 112500 prestige points to buy it for 500000 silver; Second (for breeding) requires gold coins
• Lava - Need at least 150000 prestige points to buy it for 500000 silver; Second (for breeding) requires gold coins
• Splashy - Need at least 2500 PvP monthly points to buy it for 20000 honor points; Second (for breeding) requires gold coins
• Angelo - Catch in ANY normal mode map with a 5% capture rate for a full HP Angelo but able to be raised to 15% when it's at very little HP; You can capture more than 1 in the wild.
• Crystal - Complete Barren Land veteran map 15; Second (for breeding) is currently not available**

Good luck!

Just Earn Enough Prestige Points and Silver

And for breeding them just buy 1000$ of coins
Except Angelo Merkel

2nd crystal cant be bought with coins, dont know how to get the 2nd one though.