Dratini@Lum berry
Modest Nature
Dragon Pulse/Dragon Rush/Outrage
Thunderbolt
Flamethrower
ThunderWave
I picked Lum Berry because I think status is a problem for Dratini, with so many resistances to elements... Persim Berry if you give it Outrage, that way you don't lose your berry before you really need it. Other Items could probably be better, but this came to mind when I thought about what I'd want to hit Dratini with.
Dratini has a higher Physical attack than special, but doesn't really learn any good physical attacks. The modest Nature will about even out its two attack stats.
Dragon Pulse/Rush is for STAB. Dragon Rush, despite its inaccuracy, could be good in case you come up against a pokemon with really high Special Defense. Outrage doesn't have the inaccuracy and has more power, but it takes up 2-3 turns leaving you open... pick whichever one of those three you like.
ThunderBolt and Flamethrower are for coverage of all types for at least Neutral Damage. the only type Dragon isn't effective on is Steel, which Flamethrower kills.
ThunderWave is for a relative speed boost, since paralysis kills speed, and it makes a nice disabling attack.
Mudkip@Wide Lens
Adamant Nature [with Curse, Brave will probably be just as good]
Waterfall
Ice Ball
Ruck Slide/Double Team
Curse
Waterfall is for obvious STAB
Ice Ball, if you first use it on a pokemon it will be super effective on, can be really devasting after it builds power; especially when paired with Wide Lens making its accuracy 99.
Rock Slide would just be some coverage, Double Team can help Ice ball along its early Stages, and just provide some lucky cover later. Plapti recommends Rock Slide over Double Team, and I'm about equal on the two... Your team doesn't have a rock attack on it.
Curse, Lowers a pointless stat and increases both Defense and attack, it can powerup all of your attacks and also provide some defense.
Houndour@Power Herb
Flash Fire ability
Timid Nature
Flamethrower
Dark Pulse
Solarbeam
Will-o-Wisp
Houndours Defense is pitiful, so even a non-STAB'd Brick Break may kill it. I'd suggest Nasty Plot to further raise its massive Sp. Attack, but I don't think it would survive long enough to use it.
Flamethrower and Dark Pulse are for STAB.
Solarbeam will cover Rock, Ground, and Water Types, and with the power Herb you don't have to charge it. Sunny Day is left out for the same reason as Nasty Plot.
Will-o-Wisp will burn opponents, and a burn lowers attack power. That indirectly helps with the pitiful defense.
and a second moveset from Pixeity:
Houndour@ Brightpowder
Flamethrower
Sludge Bomb
Dark Pulse
Double Team
Bronzor@Leftovers
Levitate Ability
Bold/Modest/Calm Nature
Hypnosis/Confuse Ray
Calm Mind/Iron Defense
Psychic
Flash Cannon
Hypnosis or Confuse Ray, which you pick really your choice, I'd go with Confuse Ray since it can hit around any other status and always hits.
Of the second two attacks, I'd lean more towards Calm mind if you have a Bold/Modest Nature, and I'd slightly more lean towards Iron Defense if you give it a calm Nature. At the cost of one of your attacks you can have both [I'd suggest Psychic or your status attack so your opponent doesn't wall you with a Dark type]
Psychic and Flash Cannon are for STAB and both have a chance of lowering Sp. Def.
I've got two Ideas for Riolu.
Riolu@Salac Berry
Adamant Nature
Endure
Reversal
Shadow Claw
Blaze Kick/Earthquake
Endure with a Salac Berry, and you get a Speed boosted, STAB'd Reversal... if your opponent has quick attack, this fails miserably.
Shadow Claw will take out Psychics and Ghosts.
Bullet Punch/Blaze Kick were mainly filler, bullet Punch lets you go first[probably not needed], Blaze Kick offers a second High-Critical, and coverage but a lack of accuracy.
if you want to be really annoying, and a tad risky, replace the last move slot with Copycat.
Riolu@Focus Sash
Jolly Nature
Swords Dance
Brick Break
Shadow Claw
Earthquake/Blaze kick
The focus Scarf ensures you get at least one swords Dance out, and then you sweep away with the coverage offered by the other attacks... I'd lean more towards Earthquake here since Blaze kick has its inaccuracies and requires breeding.