is a pale ginger-and-white tom with green eyes and a tiny bit of black fur. He was a ThunderClan kit
, born to Mapleshade
, a RiverClan warrior
alongside his siblings, Larchkit
However, the fact that he and his siblings are half-Clan is not known to the other ThunderClan cats; instead, his father is presumed to be Birchface, the late son of the current leader, Oakstar. While Frecklewish - Birchface's sister - claims that she could see her brother in Mapleshade's kits, other cats disagree; Rabbitfur comments that Birchface could leap further than his children.
Shortly after a game involving Rabbitfur, Mapleshade takes her kits out to see her father, and Patchkit is shown to have some skill in swimming. However, Mapleshade despises water, and has to wait for a RiverClan patrol to arrive - one with Appledusk on it. He informs Mapleshade that his kits were brave, as well as adept swimmers.
After they return, Ravenwing is shown to have revealed Mapleshade's secret, and Mapleshade and her kits are banished from the Clan, as they are seen as a danger. Mapleshade and her kits then head for the RiverClan stepping stones, and when Patchkit tries to cross, water washes over him, but he still manages to get to the first step. However, he and his siblings are swept away by the second step, and although Mapleshade gets a grip on Patchkit, in the end, the kits drown in the river. Mapleshade desperately tries to lick them, but it is to no avail. Shortly afterwards, Mapleshade is sent away from RiverClan as well.
Mapleshade proceeds to murder Ravenwing, as well as leave Frecklewish for dead, in order to soothe the kits' voices in her head. After the two are down, only Patchkit's remains, which makes her proceed to successfully kill Appledusk. Once the tom is dead, Patchkit's voice fades away, leaving for the now-wounded Mapleshade to leave RiverClan land.
In the end, Patchkit ended up going to StarClan. In Crookedstar's Promise, when she tells her story to Crookedstar, she recounts the deaths of her kits. The story is also mentioned in The Ultimate Guide in more detail.