SCP-999 appears to be a large gelatinous mass of orange slime weighing about 120 lbs(54.4kg), with a consistency similar to that of peanut butter, which shows great affection towards people. It is one of the most, if not the most friendly SCP in the Foundation. It is known for its adorable appearance and friendly attitude.
SCP-999, also known as 'The Tickle Monster', is a Safe-class SCP under the SCP Foundation's containment. ~ SCP-999's inner monologue from 'Sudden Thoughts'. When the voices return to me, as they always do, they are angry. When I was giving my wonderful gift, I could think rationally, as I can now. They would enjoy the feeling of my mind splashing against theirs, the voices temporarily leaving my head and flooding into theirs. SCP-999 has thankfully recovered since, but the staff member in question has been reprimanded. Last week someone gave SCP-999 a can of cola along with its usual breakfast- Not only was it literally bouncing off the walls for half an hour, the carbonation make SCP-999 visibly queasy afterwards, and it refused to move or eat the rest of the day. Reminder to all staff: SCP-999 is not to consume caffeinated soft drinks of any kind.