Robin is classified as a brusier but I feel like his kit should be changed. While he does has enough damage to be a brusier most of his skills force him to go into the jungle or a duo lane but as a brusier he should be able to be played in a solo lane.
His passive, "This Guy", is perfect for a brusier because the damage scales off of health.
His Q, "Vault Kick", is a great gap closer only if you use it with his W, "Bo Master". Without his W, Vault Kick can be used for poke damage only if the opponent isn't standing behind minions.
His W, "Bo Master", is a amazing for chasing enemies down but it only lasts four seconds so if Robin can't deal enough damage in that time, the enemy escapes and you may have used up 3/4 of your skills for no reason. It does have damage reflect but if you are chasing someone down, they most likely won't attack you.
His E, "Dynamic Duo", has lifesteal that can be used in the jungle or fights but if you aren't jungling, most of the time you are going to use it to escape or combo with Bo Master to chase an enemy.
His R, "Emergent Leader", knocks back everyone including his target which makes no sense. The skill should be used in the beginning or middle of a fight because of the damage it grants but when you use it at that point, it knocks the target away from you, giving them a chance to escape. So the only viable way of using the skill is to either use it as a finisher or use it while you are with another champion.
As a brusier, Robin should be able to be played as a solo laner but when he is played as a solo lane champion, his passive is only good move, his Q needs his W or it will get blocked by minions, his W is only useful as a slow, his E will be used with his W to chase, and his R lets gives his target a chance to escape.
I'm not saying that Robin shouldn't be a jungler or a duo laner but he should be able to be a solo laner as well like other brusiers.