6th slot and moves for SS?

[Char-Broiled Toboggans]

Yeah, I'm back again, and this time with SoulSilver. I could use some help on deciding on what I should put for my 6th slot on SS, as well as what I should do for final moves. (Edit) Now training for Whitney:

Totodile lvl. 16
Timid
Top 2 stats: HP, Defense
Cut
Leer
Water Gun
Bite

Flaaffy lvl. 17
Bashful
Top 2 Stats: HP, Sp. Attack
Tackle
Growl
Thundershock
Thunder Wave

Zubat lvl. 16
Brave
Top 2 Stats: HP, Attack
Leech Life
Astonish
Bite
-
Note: I learned very soon that the PokeWalker won't teach you Pokemon moves as they level, which is why I don't have Supersonic.

Steelix (Rocky) lvl. 17
Hasty
Top 2 Stats: Defense, HP
Headbutt
Rock Tomb
Rock Throw
Screech

Gastly lvl. 12
Impish
Top 2 Stats: HP, Sp. Attack
Hypnosis
Lick
Curse
Night Shade


I'd like to keep the Pokemon already on the team, but still have a 6th to even everything out, think someone could pull that off?  

[lilharper]

to bad about your timid toto and your impish gastly
anyway
you might want an HM slave...in this game furret is a nice one