Buses available from Calicut ( Kozhikode) to Wayanad.
There is no train service to Wayanad . You can take a train from Ernakulam Junction / Town to Kozhikode (Calicut) ie 04 hours. From there you can travel to Vythiri either by bus or by car. Which takes around 2 - 2.30 hours

There are so many trains to Calicut 6.50 Am, 8.10 Am, 9.20 Am, etc From: Kochi, Kerala To: Wayanad, Kerala Time: 5 hours 33 mins Distance: 273.6 km

Route by Train / Bus from Cochin (Ernakulam) to Wayanad :
Kochi > Thrissur > Shoranur > Tirur > Feroke > Calicut.

Shoranur to Kozhikode Trains (SRR to CLT), 54 trains (86kms)
The first train from Shoranur to Calicut is RAJDHANI EXP (12431) , which leaves around 00:50

Route by Road from Calicut to Wayanad :-
Calicut > Thamarassery > Adivaram (Ghat Road 14Kms) > Lakkidi >  Vythiri > Chundale > Kalpetta.
Thamarassery Churam is a mountain pass in Kerala,India across the Western Ghats. The highway has nine hairpin bends. Churam is about 14 kilometers in length, starting from Adivaram to Lakkidi View Point

Buses available from Calicut ( Kozhikode) KSRTC BUS STAND to different parts of Wayanad such as Kalpetta, Sulthan Bathery, Mananthavady, and Mysore.

Once you reach Calicut Railway station pick up Auto rickshaw  ( Tuk Tuk ) from the outside the Autoriksaw counter and reach to KSRTC Bus Stand. From there you will get many buses to Wayanad.