Legendary Weapons of Fire Emblem
Uma Musume but they are described very poorly.
Song Names of Sonic The Hedgehog
The Percentages of Persona
The World of Sonic's Favourite Pokémon Type.
100

This is the first legendary weapon seen in FE4.

Valflame.

100

Fatty.

Oguri Cap. 

100

Escape From the City. (SA2)

City Escape.

100

The boost provided by Amp passives.

50%.

100
This type was added in the second generation, with one gen two mons gaining the type.

Steel

200
This legendary weapon has infinite uses by an NPC in Thracia.

Forsetti.

200

The Clanker.

Mihono Bourbon.

200

Endless Possibility Orchestral. (Unleashed)

Perfect Dark Gaia.

200

The base chance for Zio, Bufu and Agi to shock, freeze and burn in P5R.

25%.

200

The first game to have a pseudo of the Steel type.

Gen 3.

300
What legendary sword was the first to have 1-2 range?

The Binding Blade.

300

That one Uma with the largest "size". (Both of them)

Hishi Akebono.

300

Azure Blue World. (SA1)

Emerald Coast.

300

Miracle Punch's hit chance.

75%

300

The first game to have a legendary of the Steel type. (Bonus if you name it.)

Gen 3. (Registeel.)

400

How many Falchions are found in Awakening?

3.

400

Feb 7th instigator.

Chiyono O.
400

Vengeance is Mine. (SA2)

Radical Highway.

400

High Counter's activation rate difference from Persona 3 to Persona 4.

30%

400

This Steel type has a very convoluted evolution method that was added to it in Gen 9. 

Bisharp.

500

How many legendary weapons are there in Tellius?

Two.

500

Desuwa?

McQueen.

500

The Volcano. (Sonic 06)

Flame Core.

500

Sword Dance's Crit rate with Apt Pupil.

80%.

500

Steel had this many resistances in Gens 2-5. 

11.