Jugger is a Black Hole CO who functions very similarly to Flak, with slight differences.
Day-to-day Effects: All of Jugger's units have a widened luck range (-14% to +29%), meaning Jugger's units can sometimes deal much greater damage than expected, but can also deal less damage as well.
Power: Overclock -- Jugger's luck range is further widened. (-24% to +54%) All of Jugger's units gain 10% increased offense and defense.
Super: System Crash -- Jugger's luck range is extremely widened. (-44% to +94%) All of Jugger's units gain 10% increased offense and defense.
Since Jugger has roughly the same play style as Flak with only minute differences, most strategies for playing as and against Flak can be applied to Jugger as well. The only major change between the two is the fact that Jugger's Super CO Power costs more than Flak's to activate, making him a slightly worse CO in comparison. See Flak's page for more details.