Radical Rat is the final boss of The Alley, and if you aren’t prepared, he can be difficult to get by. Once you’re done beating Lucy, you’ll have to take down Radical Rat, who likes to throw rat bombs onto the playing field. We’ll outline some tips for beating the Radical Rat boss in Mewgenics so you can escape The Alley.
Radical Rat Boss Guide in Mewgenics

Your success in each combat encounter can vary depending on your cats’ builds, but there are still definitive ways to take down Radical Rat. My team was made up of a Fighter, Tank, Mage, and Ranger, which is a good mix of ranged and melee attackers.
Radical Rat’s main move is throwing down bombs that take time to explode. Either get out of the way of the explosion area, or your best option is to destroy the bomb before it goes off. You can have your ranged attackers deal with the bombs, and your melee attackers damage Radical Rat.

My weather condition ended up working in my favor, as it was snowing, so whenever my one cat spat on Radical Rat, he would freeze into an ice cube. This would essentially ruin his turn and stop him from attacking.
Radical Rat will also use the Turtle move, hiding in a bucket to avoid his bombs’ explosions. You will have to wait for him to uncover himself before you can deal damage.
Overall, use the weather conditions to your advantage, keep your ranged attackers far from Radical Rat, and defuse the bombs before they explode. Following these methods will make this fight a breeze.
