The latest batch of Gen-3 additions to Pokemon GO also happened to include a new challenging Battle Raid boss. Although level five legendary raids have been getting all the attention for the last few months, the new addition of Aggron makes level four raids a little more interesting. That means trainers need to start powering up the right squad to take down the new challenge.

Here's what Pokemon GO players need to know about Aggron... The Rock/Steel-type is weak against Fighting-, Ground-, and Water-types. Unfortunately, the big bad also is resistant to Bug-, Dragon-, Fairy-, and a long list of other types. That makes taking this one down a little more challenging than usual. Here is the squad we recommend taking into battle:

The ideal counters for Aggron include Machamp, Hariyama, and Groudon. With the correct move sets, a handful of trainers with these Pokemon should be able to power right through Aggron. That said, not everyone has a roster full of Groudons, so there are some alternatives.

The next tier of counters includes Heracross and Blaziken. These are both good counters that are perfect for filling in the roster once the tier one counters have taken a beating. In addition to the others, Breloom is also a viable glass counter for this fighter. Just don't expect it to hold up to Aggron's attacks very long.

Give those squads a try and see how it goes. Good luck out there, trainers!

Pokemon GO is available now in select regions on Android and iOS devices.