Pokemon EV - Stats - Team Build

[Blightning288]

Hello pokecommunity,
I'm still new to the forums so if I'm posting in the wrong place please tell me.

(Anyway, I don't find it too polite to register and the first thing I do is to create a thread and ask for help, but I'm facing a problem here.)

- - -

My current team is:

'Togekiss' (F) level 55 - Hasty
HP: 165
Attack: 77
Defense: 122
Sp. Atk: 155
Sp. Def: 141
Speed: 116

Attacks: Sky Attack, ExtremeSpeed, Fly, Aura Sphere.

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'Torterra' (M) - level 54 - Timid
HP: 174
Attack: 126
Defense: 133
Sp. Atk: 93
Sp. Def: 107
Speed: 83

Attacks: SolarBeam, Energy Ball, Crunch, Earthquake.

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'Zoroark' (M) - level 53 - Quiet
HP: 137
Attack: 123
Defense: 85
Sp. Atk: 156
Sp. Def: 81
Speed: 117

Attacks: Shadow Claw, Fury Swipes, Torment, Faint Attack.

-

'Mienshao' (F) - level 57 - Bold
HP: 158
Attack: 142
Defense: 101
Sp. Atk: 135
Sp. Def: 86
Speed: 149

Attacks: Hi Jump Kick, Brick Break, Bounce, Drain Punch.

-

'Milotic' (F) - level 54 - Serious
HP: 183
Attack: 88
Defense: 103
Sp. Atk: 117
Sp. Def: 147
Speed: 96

Attacks: Blizzard, Hydro Pump, Recover, Surf.

-

'Pikachu' (M) - level 69 - Quirky
HP: 141
Attack: 134
Defense: 54
Sp. Atk: 87
Sp. Def: 85
Speed: 158

Attacks: Thunderbolt, Iron Tail, Quick Attack, Volt Tackle.

I tried looking for guides/help but I fail and I get a little bit confused with the stuff. But I look forward to learn. Anyway, the real deal is that I find my pokemons weak... Specially my pikachu, it's nerfed as you can see it might (nor might not) have lot of Attack and Speed, but a single hit takes half his health or kills him and I can no longer use Vitamines and I don't have the berries to undo stats. I'll have to breed another Volt Tackle one, oh well. Also, in some pokemons stats are pink and blue colored, what does that mean? - I wish to make my team strong, any tips?

Thank you in advance.

 

[Arma]

Alright, The colored stats refer to the nature of your pokemon, For example, a timid one would have his attack in blue and its speed in red. A blue stat means that it's decreased with 10%, a red stat means it's increased with 10%