Several indirect mentions in There Will Be Brawl; the title drop actually refers to the "brawl" that eventually erupts in the last episode. It also refers to the fact that the series is a dark Affectionate Parody of Super Smash Bros. Brawl as a whole. In order, it's mentioned by Luigi in the fourth episode, Dedede in the fifth, Olimar in the eigth, and Bowser in the ninth.
Then it's over, Heaven number seventy-nine dopplering into our wake, torn bodily from its extradimensional moorings, fine structure bucking, scattering and shattering.
This is made more interesting by the fact that this chapter was incorporated retroactively. However, the author had apparently written it with the intention of adding it eventually.
Another web-novel, Fragile, features this trope in two different parts that use the title in them — once in the middle and another time at the very end. Both times, the title refers to Severin, with the latter referring to his mental state and the former just generally referring to Page's perception of him.
Retsupurae pointed this out in their Trapped retsuflash.
Later, during the third game of the series they throw in forced title drops to all three games in the series—Trapped, Pursuit and Escape—in immediate succession.
It was also done during their Arise 2 retsufrash: "Once more...I'm arising to kill whoever did this to me."
In Darwin's Soldiers, the first RP does a title drop with the last line of the last post.
Neku: This is more...than anything I could have asked for. From now on...we're a team. We are, I guess, in a way...Darwin's Soldiers. The next evolution of warriors...
Protagonist: Explicitly stating the moral of the story, and awkwardly working in...the Movie Title.
Orion's Arm is in fact set in that arm of our galaxy but the real title drop is the mention of a worldbuilding project in the setting meant to simulate the world of Orion's Arm which is itself named Orion's Arm.
Done frequently and to comedic effect (usually with the exact same clip) in Doom House:
"Police Officer:" Baggies! I've seen these before. Ohhhh, this is evidence! Evidence of... A DOOM HOUSE! Reginald P. Linux: A doom house? "Police Officer:" A doom house.
The Platoon Of Power Squadron has the titular platoon/squadron come up with the name on the spot, which is why it's so Redundant and silly-sounding. The show was named that long before this episode, but at least it's justifyed in-universe.
Rarity: But I don't get it. How were you able to get down there so quickly? Rainbow Dash: Gee, Rarity, I don't know, I guess you could say I'm an Ultra. Fast. Pony. Everyone: Aaaaaaaaaaaaaaaaaaaaaaaaawwwwwwww!