Wikia

Intimidation (威嚇 Ikaku) is a technique used by powerful fighters. It projects a person's "aura" or "fighting spirit". This spirit takes the shape of some large, fearsome creature, unique to each person and is often reflecting their own personality. Intimidation is often used as a means to try to scare the opponent, which can cause them to run away or literally get frozen in place by fear (the latter being called "Intimidation Knocking"). In this way, intimidation can be used to end a confrontation or situation non-violently. Using intimidation to scare an opponent will only work if the opponent is significantly weaker than the user but it can also be used to startle many powerful fighters. Intimidation is less effective on those who have the "resolve" to put their lives on the line such as when Starjun used it against Komatsu. Though it could be argued that this was partly contributed to Starjun using a GT robo at the time which would likely lessen the impact as later, when Toriko and Komatsu meet Starjun in person, both of them were shown to be unnerved around him even when he hadn't used his intimidation.