When you defeat the C.J, you get whats called a sumon. there are 3 types of summons-Call a Cog, Call a Invasion, And Summon a Cog Building. Summun a cog u press and it gives you the cog it was on. Summon a cog building and it gives you a cog building of that spacies(ex.flunky=bossbot building), summon a cog invasion is where you press it and that type of cog invades the district your in for 10-15 minutes
hope this helps