From the Super Mario Wiki
“Where to begin...? My name...is Merlon. I am a wizard. When I was reading the stars the other day, an oracle came to me. What I discovered is very important, and it concerns you.”
Merlon is a wizard from the Paper Mario series. Merlon appears to be of the Shaman species. Although he is often depicted as stubborn and comical, Merlon's integral wisdom inherently shines through, especially in Super Paper Mario. He is named after the wizard of Arthurian Legend, Merlin, and all his relatives (Merlee, Merlow, Merluvlee, etc.). In the first three games in the Paper Mario series, Merlon's mustache is longer than in the previous one, but while his overall appearance changes, the clasp of his cloak always resembled a Star Point. According to Wonky in Paper Mario: The Thousand-Year Door, every person in the clan of the Ancients that has the same job have the same name. Based on this, it is possible that each Merlon is, in fact, a separate individual. This is further evidenced by Merlon introducing himself to Mario in Super Paper Mario.
 Paper Mario
In Paper Mario, his house has a spinning roof and is located in front of the gates to Princess Peach's Castle, in Toad Town. Mario first needed Merlon's help when a gang of black Toads blocked the way to the Koopa Bros. Fortress. In order to get rid of them, Mario had to talk to Merlon, then guide the wizard to the Toads (who were actually The Koopa Bros. in disguise). Later in the game, Merlon would be standing outside of his house. If Mario spoke to him, he would tell Mario of an oracle that spoke to Merlon in his sleep. Later, when Mario entered his house after Chapter 6, he requested Mario to go to Starborn Valley.
 Paper Mario: The Thousand-Year Door
In Paper Mario: The Thousand-Year Door, Merlon is the neighbor of Professor Frankly in Rogueport. For three Shine Sprites, Merlon can upgrade one of Mario's partners. If Mario gives Merlon the Up Arrow, Mario's partners can be Ultra Ranked. This Merlon may, in fact, be a different Merlon than the one in Paper Mario. This is because Wonky states there is a fortune-telling clan that names its members after their role in the clan. Perhaps the name "Merlon" indicates a certain role or ability one performs in the fortune-telling clan.
 Super Paper Mario
“To feel sadness is to live, but as long as you are alive, the future is a blank page.”
Merlon appears in Super Paper Mario, living in the town of Flipside (This residence makes him appear rather angular and strange). Similar to the Merlon in Paper Mario: The Thousand Year Door, this may be a different Merlon. This Merlon has the most central role in the game out of the previous ones. He tells Mario the prophecy of the Light Prognosticus and provides the first Pure Heart of the game. He has a distant cousin living in Flopside whose name is also Merlon; however, the Flopside Merlon suggests to Mario that to tell the two apart he be called Nolrem. He also gets a quick mention when Tippi is tattling Bestovius.
According to Carson, the Super Paper Mario version of Merlon once fell in love with Saffron the cook. He went to her cooking shop each day and wooed her constantly. One day, he finally confessed his love to her. She said that if he finished a Saffron Special Galactic meal (one of the biggest, most filling dish anyone had ever seen), she would believe in his love, and so he dug right in. Spectators say he finished all but a little bit of parsley left on the plate. Suddenly, a poor, injured girl entered the town. Merlon had to help her, so Saffron suspended the challenge for him. He had become engrossed into his studies ever since, and he never got the chance to go back to the challenge. As well as wooing Saffron, Merlon spent some of his free time at the Flipside Arcade, where he has a high score of 400000 in Forget Me Not.
Merlon's Catch Card can be found in one of the holes in the Flipside first floor outskirts, as can the Merluvlee card.
Card Type: Uncommon
 Names in Other Languages