Fire Emblem has many terms and stats that translate well into hax and stats, but some don't exactly do that well. This section is to explain what these are.
Stats
Mov/Movement: the stat that is relative to their travel speed. A unit with a higher Mov is more likely to have a higher travel speed than a unit with a lower Mov (example: A Cavalier has a move of 7 in recent games while a Knight only has a Mov of 4 with most classes having 5 Mov for unpromoted classes)
Res/Resistance: resistance to Resistance Manipulation. This thread talked about how Magic in Fire Emblem is Resistance Negation, so Fire Emblem characters all have some degree of resistance to Resistance Negation.
Avoid/Avd: Reaction Speed . Units with higher Avd are able to dodge more complex and faster attacks.
Hit rate: Combat Speed . Units with higher hit rates are able to hit units with high Avd.
Critical hits: Damage Boost (3x normally, 4x with Fates Brave Weapons) and Distance Negation (critical hits ignore avoid). Critical hits occasionally happen with each attack and are affected by crit chance.
Dodge/Evade/Critical Avoid: resistance to distance negation
Abilities
Magic: Magic in Fire Emblem is a form of Resistance Negation, so any characters with access to magic or attacks that target Resistance will have Resistance negation.
Einherjar: grants Summoning of otherworldly heroes (optional equipment). Fates and Awakening only
Mila's Turnwheel: grants Time Manipulation (can rewind time a limited amount of times) and Summoning (can summon phantoms of monsters or phantoms of otherworldly heroes). Alm (Echoes) and Celica (Echoes) only.
Divine Pulse: Grants Time Manipulation (Can rewind time, does so automatically on the user's death, and can stop time indefinitely). Byleth (Three Houses) and Sothis only
Sing/Dance: Restores an ally's motivation and stamina.
Rally: Rallies are skills that provide buffs to nearby allies for a limited time. All rallies stack with each other. There are a few skills that are considered "rallies" that aren't a Rally skill (example: Laslow's Fancy Footwork Personal Skill is Skill that activates the Rally command). All Rallies are Statistics Amplification and Bestowal .
Azura's Song: Restores an ally's motivation and stamina, Mind Manipulation, limited Portal Manipulation (the song can be used to open portals to and from Valla at any body of water), Purification (Type 2; released Takumi of his possession), weakness manipulation (can make dragons vulnerable to normal weaponry). The potency is determined by the speed and "aggression" of the song, becoming more potent as the speed and aggression is increased , but drains the user's life more (ex: using it to restore an ally's motivation and stamina only leads to the user becoming slightly tired, however using it at high potency for Mind Manipulation leaves the user in a state nearing death). Results in self Erasure from overuse. Can only be used by the Valla Royal Family (Azura and Shigure are the only known users, but it is implied others with the blood could use it as well) with Azura's Pendant
Pair Up: Statistics Amplification (varies depending on the second person). One is the Vanguard or Lead Unit and the second person is the Support Unit. Requires a second person. Awakening, Fates, and Warriors Only
Archanean Fire Emblem: The Fire Emblem has all of the abilities of the Spheres that make up the gems that adorn it (The only reason it doesn't in game is because of game mechanics). Those abilities are Power Nullification (Negates terrain bonuses of enemies, effective bonuses they might have against the user, distance negation, enemy attacks, attack nullification), Passive Healing (Fully restores the user), Statistics Amplification (Raises all the user's stats and growths), Shockwave Manipulation (Can be used to create damaging shockwaves in all directions across kilometres), Statistics Amplification and Bestowal (Combat Speed and Critical chance) to allies, Sealing (Can seal the powers of Dragons), the ability to open locks. Only Marth, Chrom and Lucina have used the full Fire Emblem in character, however anyone playable from Marth's games (FE 1, 3, 11, and 12) can wield the Spheres which grant the above abilities minus sealing and lock picking.
Awakening: A technique that Fire Emblem Warrior characters posses that provides Statistics Amplification to all stats besides life.
Warrior Special: A special attack Fire Emblem Warrior characters have. What hax this gives is determined by the character, but it the strongest attack the character has and can be used after attacking and getting attacked after a while.
Dual Support: Statistics Amplification (combat speed, reaction speed, crit chance, resistance to distance negation), amp depends on how many people there are and the relationship between the characters. Requires at least a second person. Awakening and Fates Only.
Dual Strike: Distance Negation (support units ignore distance while attacking as well as ignores Avoid). Requires a second person. Awakening and Fates only.
Dual Guard: Power Nullification (Dual Guard prevents any and all damage when it activates). Requires a second person. Awakening and Fates only.
Pair up bonus: Statistics Amplification (determined by the supporting unit's class). Requires a second person. Awakening and Fates only.
Support Bonus: Statistics Amplification (Determined by the characters). Requires at least a second person. Most Fire Emblem games have Supports and Support Bonuses in some form.
Skills
Normal Skills: WARNING: DO NOT ASSUME SKILLS WORK THE EXACT SAME FOR ALL CHARACTERS UNLESS THEY ARE FROM THE SAME GAME (ex. A character in Radiant Dawn using Sol would not have the same effect as a character from Awakening using Sol, although they are still similar at their bases). Skills provide abilities for the characters to use in combat or provide passive bonuses. Any skills not listed from a game are usually enemy only or restricted to a few characters (Example being Conquest in Awakening) and should only be put on those few characters' pages. The normal limits on skills a character can have "equipped" is due to game balance, in an actual battle, they would have access to all skills they can learn. All skills in Fire Emblem Warriors are Passive.
Combat Arts: Combat Arts have appeared in two games, Echoes and Three Houses, usually with a cost to their activation, which is a game mechanic to balance them out. Combat Arts are similar to skills but most combat arts are actually active with weapons rather than passive in use.
Heroes' Skills: Heroes follows a different set of skill functions. There are 6 types of Skills in Heroes: Weapons, Assist, Special, Passive A, Passive B, and Passive C. Heroes characters have access to all non-exclusive skills if they are given prep time for a match, as there is a process for the Heroes to gain those skills. Exclusive skills