Pride is a feeling of deep pleasure or satisfaction derived from one's own achievements, the achievements of those with whom one is closely associated, or from qualities or possessions that are widely admired. While it can be a normal feeling for one to have, it can be dangerous when it becomes a high or inordinate opinion of one's own dignity, importance, merit, or superiority, whether as cherished in the mind or as displayed in bearing, conduct, etc. In that sense, pride is one of the seven deadly sins.
The Smurfs struggle with pride in various ways. Brainy deals with his self-importance as the most intelligent Smurf among his peers. Hefty and Handy deal with pride in their own particular skills and strengths when they are in conflict with each other. Vanity deals with his vanity as the most handsome Smurf among his peers. In "The Golden Smurf Award", pride becomes an issue when every Smurf except for Clumsy votes for themselves as being the one who is worthy to receive the episode's titular award, which turns out to be Hogatha and her pet vulture disguised as a trophy.
Aeon of the Champion (AoC Universe)
Pride appears in its physical form as Lucithel, the Lord of Hubris and most powerful demon prince in the entirety of the Black Empire. It is this same hubristic pride that brought about his downfall during the showdown on the Hellfire Plateau, as by toppling his own Spire of Darkness to release the demonic energy that had been brewing inside, he opened himself to attack by exhaustion - as he subsequently swelled to such a large size, there was more to defend, and the full force of his dark magic was unable to meet this increased demand; he exploded into a million pieces after waves of light halos were piled onto him.
Duterius, Archangel of Valour and leader of the Aesir (following Lucithel's betrayal), has been accused of showing pride several times, such as during the Sudden Siege of the Silver City when he appeared to underestimate the threat of the marching hordes approaching the city's eastern gate, allowing the demons to do more damage than they should have. He is also partly liable for the death of the pantheonic gods, as he gave the order to continue fighting the demons (all part of Sargamon's plan to distract him) rather than acting on Regael's concerns that the Holy Sanctuary had been breached (a sound concern given that it had been breached - by Sargamon).
Dan'Ariz, the sarmatian King, showed incredible hubris in his handling of the Cerulean Plateau, as his drive to increase his magic power resulted in his consulting with demonic powers, paving the way for a highly-destructive War of the Ancients.